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Restoring a DC for Disaster Recovery Test

We are conducting our first DR Test next month at on of IBMs secure facilities.  Our 2 DCs here at Corporate are VMs on a VMware ESXi 4.1 host.  We use BackupExec 2010 R3 to backup the DCs, the total C: long witht the System State and Service State under Shadow Copy Components.  Our AD also has, in addition to our 2 Corporate DCs, 7 Sites with a DC in each location.  All DCs are running Windows Server 2008 R2 SP1.  We want to restore 1 of the Corporate DCs for the test so we have one to Authenticate accounts against.  The concern I have is that in so doing this when this DC comes up its going to know "Hey I am up but I can't talk to my other buddies that I use to talk to."   This I think will be a problem for this DC to function properly.  Would I have to delete AD entries of the other DCs in order to avoid such errors?  If so, where would I carry this out?  Any direction and advice would be appreciated.  Thanks

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