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Proper steps to bring Domain Controller back online within the WAN - DC was offline for 5 weeks.

A recent hurricane tore up one of my facilities over a month ago.  Since then the domain controller has been offline and users have been working of their local machines from home.

Next week I have to bring this network back up and I'm concerned about the domain controller.

I'm looking for the best approach  to bring this back online.  Note, this is a WAN that replicates to other DC's across the state.
1 Solution
I think that a long as you have not changed the default 90 day AD expiration, you should be fine.

Just put it on the WAN and force a replication of AD.

I hope this helps !
Joseph DalyCommented:
I think you should be alright to just bring it back online cause it was only offline for thirty days. If you are truly that concerned you may be able to take a system state backup from one of your DC's that has been running correctly and using directory services restore mode load that data into your DC that was powered off.

To me that seems a little overkill as said above just turn on the DC and make it replicate to an up to date DC. The up to date DC should be the authoritative memeber in the replication.
You MUST check the tombstone setting - is normally either 60 days or 180 depending on the version of AD. - Check with this command

dsquery * " cn=Directory Service,cn=Windows NT,cn=Services,cn=Configuration,dc=<ForestRootDN>" -scope base -attr tombstonelifetime

If the server has been down for LESS than the tomstone period then no issues

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