I am trying to prepare for a planned power outage. Our building will be with out power for 3 to 4 days (possibly 5 days). Our plan is to backup and shut down... 3 to 4 days later, bring everything back up.
My concern is with FSMO (Active Directory) TTL of 90 minutes.
I understand TTL on non-FSMO (60 to 180 days) and FSMO is 90 minutes. this is assuming the domain will be up and in use... we are trying to schedule 3 to 4 days of complete shut down, no building power. How long can we be down? 90 minutes? is there a way to increase the TTL on the FSMO AD Server? or do I not need to be concerned.