Monthly Archives: December 2014

[ERROR] Could not find the Exchange Mailbox Administrators Universal Security Group through its well-known GUID

I came across a weird error the other day while running Exchange Server 2013 CU6 setup with the /PrepareAD switch.  The error (from the Exchange setup logs) was this: [12/02/2014 01:14:16.0727] [2] [ERROR] Could not find the Exchange Mailbox Administrators Universal Security Group through its well-known GUID 29a962c2-91d6-4ab7-9e06-8728f8f842ea.  Please make sure that Setup /prepareAD has… Read More »