Identity API requirement sets

Requirement sets are named groups of API members. Office Add-ins use requirement sets specified in the manifest or use a runtime check to determine whether an Office application supports APIs that an add-in needs. For more information, see Office versions and requirement sets.

Office Add-ins run across multiple versions of Office. The following table lists the Identity API requirement sets, the Office client applications that support that requirement set, and the build or version numbers for the Office application.

Requirement set Office 2021 or later on Windows
(one-time purchase)
Office on Windows
(connected to a Microsoft 365 subscription)
Office on iPad
(connected to a Microsoft 365 subscription)
Office on Mac
(connected to a Microsoft 365 subscription)
Office on the web
IdentityAPI 1.3 Build 16.0.14326.20454 or later Version 2008 (build 13127.20000) or later Not supported 16.40 or later Microsoft SharePoint Online and OneDrive*

* Currently, the requirement set is supported in Office on the web only for documents that are opened from Microsoft SharePoint Online and OneDrive.

Outlook and Identity API requirement sets

To require the Identity API set 1.3 in your Outlook add-in code, check if it's supported by calling isSetSupported('IdentityAPI', '1.3'). Declaring it in the Outlook add-in's manifest isn't supported. You can also determine if the API is supported by checking that it's not undefined. For further details, see Using APIs from later requirement sets.


In an Outlook add-in using event-based activation, the OfficeRuntime.Auth interface is supported on Office on Windows version 2108 (build 14326.20258) or later. The Office.Auth interface is supported on version 2109 (build 14425.10000) or later. For more details according to your version, see the update history page for Office 2021 or Microsoft 365 and how to find your Office client version and update channel.

Office versions and build numbers

To find out more about versions, build numbers, and Office Online Server, see:

Office Common API requirement sets

For information about Common API requirement sets, see Office Common API requirement sets.

See also