Monthly Archives: February 2017

DirSync and Azure AD Sync tools approaching end of support

As announced by Microsoft a while ago, the DirSync and Azure AD Sync tools has been deprecated and support of both products is expiring. The announced time is approaching, and both DirSync and Azure AD Sync will reach End of Support on 13. April 2017. DirSync and Azure AD Sync have been replaced by Azure… Read More »

Fixing the "ExchangeGuid is mandatory on UserMailbox" issue

During a recent Office 365 migration project I ran into an issue on the on-premises Exchange 2013 platform, when trying to create Mail User objects for the migrated mailboxes. The following error appeared when adding a new Mail User: ExchangeGuid is mandatory on UserMailbox. Database is mandatory on UserMailbox. After first verifying that the Exchange… Read More »