I have a Windows 2008 R2 server that was used as an ADMT server for migrating 2 separate domains into a new single domain. The current domain is a Windows 2012 domain. A while ago, a network refresh occurred and someone shut this server down and never powered it back up. This has been about 3 months. I would like to decommission it, but I'm afraid to power it back on to demote it and remove it from the domain. My fear would be reverse replication where it pushes old Active Directory data to our good domain controllers. Would that happen? Could that happen? Should I just treat it as an orphaned domain controller and try to manually get rid of it? Or is it safe to power it on and demote it? Thanks!