I know how to set an authoritative time server in Server 2008 R2. That's not what this question is. I want to know how I can change the time on a network where the PDC (and therefore everything) is a month out of date?
I know that a 5 minute difference in time between clients and the domain prevents logons, so just changing the time on the PDC will break everything.
What is the best way to fix this?