Set-OwaMailboxPolicy

Syntax

Default (Default)

Set-OwaMailboxPolicy
    [-Identity] <MailboxPolicyIdParameter>
    [-AccountTransferEnabled <Boolean>]
    [-ActionForUnknownFileAndMIMETypes <AttachmentBlockingActions>]
    [-ActiveSyncIntegrationEnabled <Boolean>]
    [-AdditionalAccountsEnabled <System.Boolean>]
    [-AdditionalStorageProvidersAvailable <Boolean>]
    [-AllAddressListsEnabled <Boolean>]
    [-AllowCopyContactsToDeviceAddressBook <Boolean>]
    [-AllowedFileTypes <MultiValuedProperty>]
    [-AllowedMimeTypes <MultiValuedProperty>]
    [-AllowedOrganizationAccountDomains <String[]>]
    [-AllowOfflineOn <AllowOfflineOnEnum>]
    [-AttachmentsOfflineEnabledWin <Boolean>]
    [-BizBarEnabled <Boolean>]
    [-BlockedFileTypes <MultiValuedProperty>]
    [-BlockedMimeTypes <MultiValuedProperty>]
    [-BookingsMailboxCreationEnabled <Boolean>]
    [-BookingsMailboxDomain <String>]
    [-BulkImportEMLEnabled <BulkImportEMLEnabledProperty>]
    [-BoxAttachmentsEnabled <Boolean>]
    [-CalendarEnabled <Boolean>]
    [-ChangePasswordEnabled <Boolean>]
    [-ChangeSettingsAccountEnabled <System.Boolean>]
    [-ClassicAttachmentsEnabled <Boolean>]
    [-ConditionalAccessPolicy <PolicyEnum>]
    [-Confirm]
    [-ContactsEnabled <Boolean>]
    [-DefaultClientLanguage <Int32>]
    [-DefaultTheme <String>]
    [-DelegateAccessEnabled <Boolean>]
    [-DirectFileAccessOnPrivateComputersEnabled <Boolean>]
    [-DirectFileAccessOnPublicComputersEnabled <Boolean>]
    [-DisableFacebook]
    [-DisplayPhotosEnabled <Boolean>]
    [-DomainController <Fqdn>]
    [-DropboxAttachmentsEnabled <Boolean>]
    [-EmptyStateEnabled <Boolean>]
    [-ExplicitLogonEnabled <Boolean>]
    [-ExternalImageProxyEnabled <Boolean>]
    [-ExternalSPMySiteHostURL <String>]
    [-FeedbackEnabled <Boolean>]
    [-ForceSaveAttachmentFilteringEnabled <Boolean>]
    [-ForceSaveFileTypes <MultiValuedProperty>]
    [-ForceSaveMimeTypes <MultiValuedProperty>]
    [-ForceWacViewingFirstOnPrivateComputers <Boolean>]
    [-ForceWacViewingFirstOnPublicComputers <Boolean>]
    [-ForceWebReadyDocumentViewingFirstOnPrivateComputers <Boolean>]
    [-ForceWebReadyDocumentViewingFirstOnPublicComputers <Boolean>]
    [-FreCardsEnabled <Boolean>]
    [-GlobalAddressListEnabled <Boolean>]
    [-GoogleDriveAttachmentsEnabled <Boolean>]
    [-GroupCreationEnabled <Boolean>]
    [-HideClassicOutlookToggleOut <System.Boolean>]
    [-InstantMessagingEnabled <Boolean>]
    [-InstantMessagingType <InstantMessagingTypeOptions>]
    [-InterestingCalendarsEnabled <Boolean>]
    [-InternalSPMySiteHostURL <String>]
    [-IRMEnabled <Boolean>]
    [-IsDefault]
    [-ItemsToOtherAccountsEnabled <System.Boolean>]
    [-JournalEnabled <Boolean>]
    [-JunkEmailEnabled <Boolean>]
    [-LinkedInEnabled <Boolean>]
    [-LocalEventsEnabled <Boolean>]
    [-LogonAndErrorLanguage <Int32>]
    [-MessagePreviewsDisabled <Boolean>]
    [-MonthlyUpdatesEnabled <Boolean>]
    [-Name <String>]
    [-NotesEnabled <Boolean>]
    [-NpsSurveysEnabled <Boolean>]
    [-OfflineEnabledWeb <Boolean>]
    [-OfflineEnabledWin <Boolean>]
    [-OneDriveAttachmentsEnabled <Boolean>]
    [-OneWinNativeOutlookEnabled <System.Boolean>]
    [-OnSendAddinsEnabled <Boolean>]
    [-OrganizationEnabled <Boolean>]
    [-OutboundCharset <OutboundCharsetOptions>]
    [-OutlookBetaToggleEnabled <Boolean>]
    [-OutlookDataFile <OutlookDataFileFeatureState>]
    [-OutlookNewslettersAccessLevel <OutlookNewslettersAccessLevel>]
    [-OutlookNewslettersReactions <OutlookNewslettersFeatureState>]
    [-OutlookNewslettersShowMore <OutlookNewslettersFeatureState>]
    [-OWALightEnabled <Boolean>]
    [-OWAMiniEnabled <Boolean>]
    [-PersonalAccountCalendarsEnabled <Boolean>]
    [-PersonalAccountsEnabled <System.Boolean>]
    [-PersonalBookingsDisabled <Boolean>]
    [-PhoneticSupportEnabled <Boolean>]
    [-PlacesEnabled <Boolean>]
    [-PremiumClientEnabled <Boolean>]
    [-PrintWithoutDownloadEnabled <Boolean>]
    [-ProjectMocaEnabled <Boolean>]
    [-PublicFoldersEnabled <Boolean>]
    [-RecoverDeletedItemsEnabled <Boolean>]
    [-ReferenceAttachmentsEnabled <Boolean>]
    [-RemindersAndNotificationsEnabled <Boolean>]
    [-ReportJunkEmailEnabled <Boolean>]
    [-RulesEnabled <Boolean>]
    [-SatisfactionEnabled <Boolean>]
    [-SaveAttachmentsToCloudEnabled <Boolean>]
    [-SearchFoldersEnabled <Boolean>]
    [-SetPhotoEnabled <Boolean>]
    [-SetPhotoURL <String>]
    [-ShowOnlineArchiveEnabled <Boolean>]
    [-SignaturesEnabled <Boolean>]
    [-SilverlightEnabled <Boolean>]
    [-SkipCreateUnifiedGroupCustomSharepointClassification <Boolean>]
    [-SMimeEnabled <Boolean>]
    [-SMimeSuppressNameChecksEnabled <Boolean>]
    [-SpellCheckerEnabled <Boolean>]
    [-TasksEnabled <Boolean>]
    [-TeamSnapCalendarsEnabled <Boolean>]
    [-TextMessagingEnabled <Boolean>]
    [-ThemeSelectionEnabled <Boolean>]
    [-ThirdPartyAttachmentsEnabled <Boolean>]
    [-UMIntegrationEnabled <Boolean>]
    [-UNCAccessOnPrivateComputersEnabled <Boolean>]
    [-UNCAccessOnPublicComputersEnabled <Boolean>]
    [-UseGB18030 <Boolean>]
    [-UseISO885915 <Boolean>]
    [-UserVoiceEnabled <Boolean>]
    [-WacEditingEnabled <Boolean>]
    [-WacExternalServicesEnabled <Boolean>]
    [-WacOMEXEnabled <Boolean>]
    [-WacViewingOnPrivateComputersEnabled <Boolean>]
    [-WacViewingOnPublicComputersEnabled <Boolean>]
    [-WeatherEnabled <Boolean>]
    [-WebPartsFrameOptionsType <WebPartsFrameOptions>]
    [-WebReadyDocumentViewingForAllSupportedTypes <Boolean>]
    [-WebReadyDocumentViewingOnPrivateComputersEnabled <Boolean>]
    [-WebReadyDocumentViewingOnPublicComputersEnabled <Boolean>]
    [-WebReadyDocumentViewingSupportedFileTypes <MultiValuedProperty>]
    [-WebReadyDocumentViewingSupportedMimeTypes <MultiValuedProperty>]
    [-WebReadyFileTypes <MultiValuedProperty>]
    [-WebReadyMimeTypes <MultiValuedProperty>]
    [-WhatIf]
    [-WSSAccessOnPrivateComputersEnabled <Boolean>]
    [-WSSAccessOnPublicComputersEnabled <Boolean>]
    [<CommonParameters>]

Description

Examples

Example 1

Set-OwaMailboxPolicy -Identity EMEA\Contoso\Corporate -CalendarEnabled $false

Example 2

Set-OwaMailboxPolicy -Identity Default -TasksEnabled $false

Example 3

Set-OwaMailboxPolicy -Identity OwaMailboxPolicy-Default -AllowedFileTypes '.doc', '.pdf'

Example 4

Set-OwaMailboxPolicy -Identity OwaMailboxPolicy-Default -UserVoiceEnabled $false

Example 5

Set-OwaMailboxPolicy -Identity "Default-OwaMailboxPolicy" -AllowedOrganizationAccountDomains $null

Example 6

Set-OwaMailboxPolicy -Identity "Default-OwaMailboxPolicy" -AllowedOrganizationAccountDomains "fabrikam.com","contoso.com"

Parameters

-AccountTransferEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

Parameter properties

Parameter sets

-ActionForUnknownFileAndMIMETypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ActionForUnknownFileAndMIMETypes parameter specifies how to handle file types that aren't specified in the Allow, Block, and Force Save lists for file types and MIME types. Valid values are:

• Allow (This value is the default.)
• ForceSave
• Block

Parameter properties

Parameter sets

-ActiveSyncIntegrationEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ActiveSyncIntegrationEnabled parameter specifies whether to enable or disable Exchange ActiveSync settings in Outlook on the web. Valid values are:

• $true: ActiveSync is available in Outlook on the web. This value is the default.
• $false: ActiveSync isn't available in Outlook on the web.

Parameter properties

Parameter sets

-AdditionalAccountsEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

This parameter is deprecated and no longer used.

To enable or disable personal accounts in Outlook (formerly known as the new Outlook for Windows), use the PersonalAccountsEnabled parameter.

Parameter properties

Parameter sets

-AdditionalStorageProvidersAvailable

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The AdditionalStorageProvidersAvailable parameter specifies whether to allow additional storage providers (for example, Box, Dropbox, Facebook, Google Drive, Egnyte, personal OneDrive) attachments in Outlook on the web. Valid values are:

• $true: Additional storage providers are enabled in Outlook on the web. Users can connect their additional storage providers and share files over email. This value is the default.
• $false: Additional storage providers are disabled in Outlook on the web. Users can't connect their additional storage providers or share files over email.

Parameter properties

Parameter sets

-AllAddressListsEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The AllAddressListsEnabled parameter specifies which address lists are available in Outlook on the web. Valid values are:

• $true: All address lists are visible in Outlook on the web. This value is the default.
• $false: Only the global address list is visible in Outlook on the web.

Parameter properties

Parameter sets

-AllowCopyContactsToDeviceAddressBook

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The AllowCopyContactsToDeviceAddressBook parameter specifies whether users can copy the contents of their Contacts folder to a mobile device's native address book when using Outlook on the web for devices. Valid values are:

• $true: Contacts can be copied to the device's address book in Outlook on the web for devices. This value is the default.
• $false: Contacts can't be copied to the device's address book in Outlook on the web for devices.

Parameter properties

Parameter sets

-AllowedFileTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The AllowedFileTypes parameter specifies the attachment file types (file extensions) that can be saved locally or viewed from Outlook on the web. The default values are:

.avi, .bmp, .doc, .docm, .docx, .gif, .jpg, .mp3, .one, .pdf, .png, .ppsm, .ppsx, .ppt, .pptm, .pptx, .pub, .rpmsg, .rtf, .tif, .tiff, .txt, .vsd, .wav, .wma, .wmv, .xls, .xlsb, .xlsm, .xlsx, .zip

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same file types are specified in multiple lists:

• The Block list overrides the Allow list and the Force Save list.
• The Force Save list overrides the Allow list.

Parameter properties

Parameter sets

-AllowedMimeTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The AllowedMimeTypes parameter specifies the MIME extensions of attachments that allow the attachments to be saved locally or viewed from Outlook on the web. The default values are:

• image/bmp
• image/gif
• image/jpeg
• image/png

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same MIME types are specified in multiple lists:

• The Allow list overrides the Block list and the Force Save list.
• The Block list overrides the Force Save list.

Parameter properties

Parameter sets

-AllowedOrganizationAccountDomains

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The AllowedOrganizationAccountDomains parameter specifies domains where users can add work or school email accounts in Outlook (formerly known as the new Outlook for Windows). The default value is blank ($null), which allows work or school accounts from any domain. Setting this parameter to an empty list ([]) prevents any work or school accounts from being added.

Parameter properties

Parameter sets

-AllowOfflineOn

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The AllowOfflineOn parameter specifies when Outlook Web App in offline mode is available for supported web browsers. Valid values are:

• PrivateComputersOnly: Offline mode is available in private computer sessions. By default in Exchange 2013 or later and Exchange Online, all Outlook on the web sessions are considered to be on private computers. In Exchange 2013 or later, users can only specify public computer sessions if you've enabled the private/public selection on the sign in page (the LogonPagePublicPrivateSelectionEnabled parameter value is $true on the Set-OwaVirtualDirectory cmdlet).
• NoComputers: Offline mode is disabled.
• AllComputers: Offline mode is available for public and private computer sessions. This value is the default.

When offline mode is available, users can turn offline mode on or off themselves in Outlook Web App. For more information, see Use offline settings in Outlook on the web.

Parameter properties

Parameter sets

-AttachmentsOfflineEnabledWin

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The AttachmentsOfflineEnabledWin parameter specifies whether file attachments are available for offline use in Outlook (formerly known as the new Outlook for Windows).

This parameter only applies when offline capabilities are enabled in Outlook.

Valid values are:

• $true: Users can access file attachments while working offline in Outlook. This value is the default.
• $false: Users can't access file attachments while working offline in Outlook.

Note: If the OfflineEnabledWin parameter is set to $false, offline file attachments are disabled even if AttachmentsOfflineEnabledWin is set to $true.

Parameter properties

Parameter sets

-BizBarEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

{{ Fill BizBarEnabled Description }}

Parameter properties

Parameter sets

-BlockedFileTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The BlockedFileTypes parameter specifies a list of attachment file types (file extensions) that can't be saved locally or viewed from Outlook on the web. The default values are:

.ade, .adp, .apk, .app, .appcontent-ms, .application, .appref-ms, .appx, .asp, .aspx, .asx, .bas, .bat, .bgi, .cab, .cdxml, .cer, .chm, .cmd, .cnt, .com, .cpl, .crt, .csh, .der, .diagcab, .exe, .fxp, .gadget, .grp, .hlp, .hpj, .hta, .htc, .img, .inf, .ins, .iso, .isp, .its, .jar, .jnlp, .js, .jse, .ksh, .library-ms, .lnk, .mad, .maf, .mag, .mam, .maq, .mar, .mas, .mat, .mau, .mav, .maw, .mcf, .mda, .mdb, .mde, .mdt, .mdw, .mdz, .mht, .mhtml, .msc, .msh, .msh1, .msh1xml, .msh2, .msh2xml, .mshxml, .msi, .msp, .mst, .msu, .ops, .osd, .pcd, .pif, .pl, .plg, .prf, .prg, .printerexport, .ps1, .ps1xml, .ps2, .ps2xml, .psc1, .psc2, .psd1, .psdm1, .pssc, .pst, .py, .pyc, .pyo, .pyw, .pyz, .pyzw, .reg, .scf, .scr, .sct, .search-ms, .settingcontent-ms, .shb, .shs, .theme, .tmp, .udl, .url, .vb, .vbe, .vbp, .vbs, .vhd, .vhdx, .vsmacros, .vsw, .webpnp, .website, .ws, .wsb, .wsc, .wsf, .wsh, .xbap, .xll, .xnk

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same file types are specified in multiple lists:

• The Allow list overrides the Block list and the Force Save list.
• The Block list overrides the Force Save list.

Parameter properties

Parameter sets

-BlockedMimeTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The BlockedMimeTypes parameter specifies MIME extensions in attachments that prevent the attachments from being saved locally or viewed from Outlook on the web. The default values are:

• application/hta
• application/javascript
• application/msaccess
• application/prg
• application/x-javascript
• text/javascript
• text/scriplet
• x-internet-signup

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same MIME types are specified in multiple lists:

• The Allow list overrides the Block list and the Force Save list.
• The Block list overrides the Force Save list.

Parameter properties

Parameter sets

-BookingsMailboxCreationEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The BookingsMailboxCreationEnabled parameter allows you disable Microsoft Bookings.

Parameter properties

Parameter sets

-BookingsMailboxDomain

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

{{ Fill BookingsMailboxDomain Description }}

Parameter properties

Parameter sets

-BoxAttachmentsEnabled

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE

This parameter is available only in on-premises Exchange.

This parameter is reserved for internal Microsoft use.

Parameter properties

Parameter sets

-BulkImportEMLEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

{{ Fill BulkImportEMLEnabled Description }}

Parameter properties

Parameter sets

-CalendarEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The CalendarEnabled parameter specifies whether to enable or disable the calendar in Outlook Web App. Valid values are:

• $true: The Calendar is available in Outlook Web App. This value is the default.
• $false: The Calendar isn't available in Outlook Web App.

Parameter properties

Parameter sets

-ChangePasswordEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The ChangePasswordEnabled parameter specifies whether users can change their passwords from inside Outlook on the web. Valid values are:

• $true: The Change password option is available in Outlook on the web. This value is the default in on-premises Exchange.
• $false: The Change password option isn't available in Outlook on the web.

Parameter properties

Parameter sets

-ChangeSettingsAccountEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The ChangeSettingsAccountEnabled parameter specifies whether users can change the email account where app-wide settings (for example, theme and privacy settings) are associated in Outlook (formerly known as the new Outlook for Windows). Valid values are:

• $true: Users can change their settings account in Outlook. This value is the default.
• $false: Users can't change their settings account in Outlook.

Note: The settings account is referred to as the primary account in the Outlook setting at Settings > Accounts > Email accounts > Manage.

Parameter properties

Parameter sets

-ClassicAttachmentsEnabled

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ClassicAttachmentsEnabled parameter specifies whether users can attach local files as regular email attachments in Outlook on the web. Valid values are:

• $true: Users can attach local files to email messages in Outlook on the web. This value is the default.
• $false: Users can't attach local files to email messages in Outlook on the web.

Parameter properties

Parameter sets

-ConditionalAccessPolicy

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The ConditionalAccessPolicy parameter specifies the Outlook on the Web Policy for limited access. For this feature to work properly, you also need to configure a Conditional Access policy in the Microsoft Entra admin center.

Note: When you enable a Conditional Access policy, users can no longer access the light version of Outlook on the web. An error message directs them to use the default premium experience.

Valid values are:

• Off: No conditional access policy is applied to Outlook on the web. This value is the default.
• ReadOnly: Users can't download attachments to their local computer, and can't enable Offline Mode on non-compliant computers. They can still view attachments in the browser. This doesn't apply to in-line images.
• ReadOnlyPlusAttachmentsBlocked: All restrictions from ReadOnly apply, but users can't view attachments in the browser. This doesn't apply to in-line images.

Parameter properties

Parameter sets

-Confirm

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on whether the cmdlet requires confirmation before proceeding.

• Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
• Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you to acknowledge the command before proceeding.

Parameter properties

Parameter sets

-ContactsEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The ContactsEnabled parameter specifies whether to enable or disable Contacts in Outlook Web App. Valid values are:

• $true: Contacts are available in Outlook Web App. This value is the default.
• $false: Contacts aren't available in Outlook Web App.

Parameter properties

Parameter sets

-DefaultClientLanguage

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is deprecated and no longer used.

Parameter properties

Parameter sets

-DefaultTheme

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The DefaultTheme parameter specifies the default theme that's used in Outlook on the web when the user hasn't selected a theme. The default value is blank ($null). For more information about the built-in themes that are available in Outlook on the web, see Default Outlook on the web themes in Exchange.

This parameter is a text string, and the value you specify isn't validated against the list of available themes.

Parameter properties

Parameter sets

-DelegateAccessEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The DelegateAccessEnabled parameter specifies whether delegates can use Outlook on the web or Outlook Web App to open folders that they have delegate access to. Valid values are:

• $true: Delegates can open the mailbox in Outlook on the web. This value is the default.
• $false: Delegates can't open the mailbox in Outlook on the web.

Parameter properties

Parameter sets

-DirectFileAccessOnPrivateComputersEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The DirectFileAccessOnPrivateComputersEnabled parameter specifies the left-click options for attachments in Outlook on the web for private computer sessions. Valid values are:

• $true: Open is available for attachments in Outlook on the web for private computer sessions. This value is the default.
• $false: Open isn't available for attachments in Outlook on the web for private computer sessions. Office and .pdf documents can still be previewed in Outlook on the web.

By default in Exchange 2013 or later and Exchange Online, all Outlook on the web sessions are considered to be on private computers.

Parameter properties

Parameter sets

-DirectFileAccessOnPublicComputersEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The DirectFileAccessOnPublicComputersEnabled parameter specifies the left-click options for attachments in Outlook on the web for public computer sessions. Valid values are:

• $true: Open is available for attachments in Outlook on the web for public computer sessions. This value is the default.
• $false: Open isn't available for attachments in Outlook on the web for public computer sessions. Office and .pdf documents can still be previewed in Outlook on the web.

In Exchange 2013 or later, users can only specify public computer sessions if you've enabled the private/public selection on the sign in page (the LogonPagePublicPrivateSelectionEnabled parameter value is $true on the Set-OwaVirtualDirectory cmdlet).

Parameter properties

Parameter sets

-DisableFacebook

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

Note: Facebook integration is no longer available. For more information, see Facebook Connect is no longer available.

The DisableFacebook switch specifies whether users can synchronize their Facebook contacts to their Contacts folder in Outlook on the web. By default, Facebook integration is enabled.

• To disable Facebook integration, use this switch without a value.
• To enable Facebook integration after it's been disabled, use this exact syntax: -DisableFacebook:$false.

The value of this switch is stored in the FacebookEnabled property in the output of the Get-OwaMailboxPolicy cmdlet.

Parameter properties

Parameter sets

-DisplayPhotosEnabled

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The DisplayPhotosEnabled parameter specifies whether users see sender photos in Outlook on the web. Valid values are:

• $true: Users see sender photos in Outlook on the web. This value is the default.
• $false: Users don't see sender photos in Outlook on the web.

Parameter properties

Parameter sets

-DomainController

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE

This parameter is available only in on-premises Exchange.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

Parameter properties

Parameter sets

-DropboxAttachmentsEnabled

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE

This parameter is available only in on-premises Exchange.

This parameter is reserved for internal Microsoft use.

Parameter properties

Parameter sets

-EmptyStateEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

{{ Fill EmptyStateEnabled Description }}

Parameter properties

Parameter sets

-ExplicitLogonEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

The ExplicitLogonEnabled parameter specifies whether to allow a user to open someone else's mailbox in Outlook on the web (provided that user has permissions to the mailbox). Valid values are:

• $true: A user with the required permissions is able to open someone else's mailbox in Outlook on the web. This value is the default.
• $false: A user with the required permissions isn't able to open someone else's mailbox in Outlook on the web.

Parameter properties

Parameter sets

-ExternalImageProxyEnabled

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The ExternalImageProxyEnabled parameter specifies whether to load all external images through the Outlook external image proxy. Valid values are:

• $true: All external images are loaded through the Outlook external image proxy. This value is the default.
• $false: All external images are loaded through the web browser. This is potentially unsafe, as the images could have mixed content or malformed images that ask for user credentials.

Parameter properties

Parameter sets

-ExternalSPMySiteHostURL

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ExternalSPMySiteHostURL specifies the My Site Host URL for external users (for example, https://sp01.contoso.com).

This parameter is part of rich document collaboration that allows links to documents in OneDrive to appear as regular file attachments in messages.

Parameter properties

Parameter sets

-FeedbackEnabled

Applicable: Exchange Online

This cmdlet is available only in the cloud-based service.

The FeedbackEnabled parameter specifies whether to enable or disable inline feedback surveys in Outlook on the web. Valid values are:

• $true: Inline feedback surveys are enabled. This value is the default.
• $false: Inline feedback surveys are disabled.

Surveys allow users to provide feedback on specific features. For example, for the text predictions feature, the inline feedback "Are the above autocomplete suggestions helpful (yes/no)?" is shown. If a user chooses "no" they can provide specific feedback.

Parameter properties

Parameter sets

-ForceSaveAttachmentFilteringEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ForceSaveAttachmentFilteringEnabled parameter specifies whether files are filtered before they can be saved from Outlook on the web. Valid values are:

• $true: The attachments specified by the ForceSaveFileTypes parameter are filtered before they can be saved from Outlook on the web.
• $false: The attachments aren't filtered before they're saved. This value is the default.

Parameter properties

Parameter sets

-ForceSaveFileTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ForceSaveFileTypes parameter specifies the attachment file types (file extensions) that can only be saved from Outlook on the web (not opened). The default values are:

.ade, .adp, .app, .asp, .aspx, .asx, .bas, .bat, .cer, .chm, .cmd, .com, .cpl, .crt, .csh, .dcr, .dir, .exe, .fxp, .gadget, .hlp, .hta, .htm, .html, .inf, .ins, .isp, .its, .js, .jse, .ksh, .lnk, .mad, .maf, .mag, .mam, .maq, .mar, .mas, .mat, .mau, .mav, .maw, .mda, .mdb, .mde, .mdt, .mdw, .mdz, .msc, .msh, .mshxml, .msi, .msp, .mst, .ops, .pcd, .pif, .plg, .prf, .prg, .ps1, .ps1xml, .ps2, .ps2xml, .psc1, .psc2, .pst, .reg, .scf, .scr, .sct, .shb, .shs, .spl, .swf, .tmp, .url, .vb, .vbe, .vbs, .vsmacro, .vss, .vst, .vsw, .ws, .wsc, .wsf, .wsh

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same file types are specified in multiple lists:

• The Allow list overrides the Block list and the Force Save list.
• The Block list overrides the Force Save list.

Parameter properties

Parameter sets

-ForceSaveMimeTypes

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ForceSaveMimeTypes parameter specifies the MIME extensions in attachments that only allow the attachments to be saved locally (not opened). The default values are:

• Application/futuresplash
• Application/octet-stream
• Application/x-director
• Application/x-shockwave-flash
• text/html

To enter multiple values and overwrite any existing entries, use the following syntax: Value1,Value2,...ValueN. If the values contain spaces or otherwise require quotation marks, use the following syntax: "Value1","Value2",..."ValueN".

To add or remove one or more values without affecting any existing entries, use the following syntax: @{Add="Value1","Value2"...; Remove="Value3","Value4"...}.

If the same MIME types are specified in multiple lists:

• The Allow list overrides the Block list and the Force Save list.
• The Block list overrides the Force Save list.

Parameter properties

Parameter sets

-ForceWacViewingFirstOnPrivateComputers

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ForceWacViewingFirstOnPrivateComputers parameter specifies whether private computers must first preview an Office file as a web page in Office Online Server (formerly known as Office Web Apps Server and Web Access Companion Server) before opening the file in the local application. Valid values are:

• $true: Private computers must first preview an Office file as a web page in Office Online Server before opening the file.
• $false: Private computers aren't required to preview an Office file as a web page in Office Online Server before opening the file. This value is the default.

By default in Exchange 2013 or later and Exchange Online, all Outlook on the web sessions are considered to be on private computers.

Parameter properties

Parameter sets

-ForceWacViewingFirstOnPublicComputers

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The ForceWacViewingFirstOnPublicComputers parameter specifies whether public computers must first preview an Office file as a web page in Office Online Server before opening the file in the local application. Valid values are:

• $true: Public computers must first preview an Office file as a web page in Office Online Server before opening the file.
• $false: Public computers aren't required to preview an Office file as a web page in Office Online Server before opening the file. This value is the default.

In Exchange 2013 or later, users can only specify public computer sessions if you've enabled the private/public selection on the sign in page (the LogonPagePublicPrivateSelectionEnabled parameter value is $true on the Set-OwaVirtualDirectory cmdlet).

Parameter properties

Parameter sets

-ForceWebReadyDocumentViewingFirstOnPrivateComputers

Applicable: Exchange Server 2010, Exchange Server 2013

This parameter is available only in Exchange Server 2010 or Exchange Server 2013.

The ForceWebReadyDocumentViewingFirstOnPrivateComputers parameter specifies whether private computers must first preview an Office file as a web page in WebReady Document Viewing before opening the file from Outlook Web App. Valid values are:

• $true: Private computers must first preview an Office file as a web page in WebReady Document Viewing before opening the file.
• $false: Private computers aren't required to preview an Office file as a web page in WebReady Document Viewing before opening the file. This value is the default.

By default in Exchange 2013 or later and Exchange Online, all Outlook on the web sessions are considered to be on private computers.

Parameter properties

Parameter sets

-ForceWebReadyDocumentViewingFirstOnPublicComputers

Applicable: Exchange Server 2010, Exchange Server 2013

This parameter is available only in Exchange Server 2010 or Exchange Server 2013.

The ForceWebReadyDocumentViewingFirstOnPublicComputers parameter specifies whether Public computers must first preview an Office file as a web page in WebReady Document Viewing before opening the file from Outlook Web App. Valid values are:

• $true: Public computers must first preview an Office file as a web page in WebReady Document Viewing before opening the file.
• $false: Public computers aren't required to preview an Office file as a web page in WebReady Document Viewing before opening the file. This value is the default.

In Exchange 2013 or later, users can only specify public computer sessions if you've enabled the private/public selection on the sign in page (the LogonPagePublicPrivateSelectionEnabled parameter value is $true on the Set-OwaVirtualDirectory cmdlet).

Parameter properties

Parameter sets

-FreCardsEnabled

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in on-premises Exchange.

This parameter is reserved for internal Microsoft use.

Parameter properties

Parameter sets

-GlobalAddressListEnabled

Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

The GlobalAddressListEnabled parameter specifies whether the global address list is available in Outlook on the web. Valid values are:

• $true: The global address list is visible in Outlook on the web. This value is the default.
• $false: The global address list isn't visible in Outlook on the web.

Parameter properties

Parameter sets

-GoogleDriveAttachmentsEnabled

Applicable: Exchange Server 2016, Exchange Server 2019, Exchange Server SE

This parameter is available only in on-premises Exchange.

This parameter is reserved for internal Microsoft use.

Parameter properties

Parameter sets

-GroupCreationEnabled

Applicable: Exchange Server 2013, Exchange Server 2016, Exchange Server 2019, Exchange Server SE, Exchange Online

This parameter is functional only in the cloud-based service.

The GroupCreationEnabled parameter specifies whether Microsoft 365 Group creation is available in Outlook and Outlook on the web. Valid values are:

• $true: Users can create Microsoft 365 Groups in Outlook and Outlook on the web. This value is the default.
• $false: Users can't create Microsoft 365 Groups in Outlook and Outlook on the web.

Parameter properties

Parameter sets

-HideClassicOutlookToggleOut

Applicable: Exchange Online

This parameter is available only in the cloud-based service.

The HideClassicOutlookToggleOut parameter specifies whether to enable or disable hiding the toggle in new Outlook that allows users to switch back to classic Outlook. Valid values are:

• $true: The toggle to switch back to classic Outlook is hidden in new Outlook for Windows.
• $false: The toggle to switch back to classic Outlook isn't hidden in new Outlook for Windows. This value is the default.

Parameter properties