Azure AD sync errors for administrative user accounts

This is a follow up blog post to the "Insufficient access rights to perform the operation error in Azure AD Connect" blog post I did a little while back. The original blog post covered Azure AD sync errors. For the most part, anyways, because we kept seeing sync errors for specific users. After doing a bit of digging, we have learned that the users that kept getting sync errors belong to Active Directory Administrators or Domain Admins groups. This lead our troubleshooting journey to learning about Active Directory Protected Groups.

As it turns out, if a user is a member of Active Directory Administrators or Domain Admins groups, then Active Directory will overwrite any ACL changes that you make with predefined ACL template on a regular basis. So, if we make ACL changes like grant additional permissions on those accounts or enable permissions inheritance on those accounts in order to allow Azure AD Connector to update source anchor (ms-ds-consistencyGuid) attribute, this change will be overwritten by Active Directory, which brings us back to square one. To bypass this issue, you can do the following:

  • Change ACL template in Active Directory to include the changes you need like Replicate Directory Changes and Replicate Directory Changes All permissions for Azure AD Connector account and write permissions for source anchor (ms-ds-consistencyGuid) attribute. This would work, but in my opinion, it's a bit too drastic
  • Or, remove the users from Active Directory Administrators or Domain Admins groups, if you can.
  • Or, you can make the permissions changes on those accounts and immediately force Azure AD Connect sync using the following PowerShell command: Start-ADSyncSyncCycle -PolicyType Initial. Azure AD Connect should have enough time to write to source anchor attribute and complete the sync without errors. After the initial sync is complete, AD can reset ACL back on those account all it wants since we only need to write to source anchor attribute once.

I prefer the last option, since it's simple and it works. More information about AD protected groups can be found at

Thanks for reading.