More details about features in preview
This topic describes how to use features currently in preview.
Azure AD Connect sync V2 endpoint API
We've deployed a new endpoint (API) for Azure AD Connect that improves the performance of the synchronization service operations to Azure Active Directory. By utilizing the new V2 endpoint, you'll experience noticeable performance gains on export and import to Azure AD. This new endpoint also supports syncing groups with up to 250k members. Using this endpoint also allows you to write back Microsoft 365 unified groups, with no maximum membership limit, to your on-premises Active Directory, when group writeback is enabled. For more information see Azure AD Connect sync V2 endpoint API.
The user writeback preview feature was removed in the August 2015 update to Azure AD Connect. If you have enabled it, then you should disable this feature.
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