Active directory users cannot logon to remote desktop when hamachi connection is down

We have 2 domain controllers (Server A and Server B) connected and replicating over a LogMeIn Hamachi VPN connection.  Both servers are running Terminal Services.  We want to turn Server A off and decommission it.  When we turn server A off users cannot log in to remote desktop on server B.  They get an error that no logon server are available.  How do I force Server B to serve logins for remote desktop on Server B without Server A being available?
ciosystemsAsked:
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Rob WilliamsConnect With a Mentor Commented:
Firstly it is most definitely not recommended to run terminal services on a domain controller for security reasons.
"Installing a terminal server on an Active Directory domain controller is not recommended. Allowing users to run programs on a domain controller could create security risks and performance issues."
http://technet.microsoft.com/en-us/library/cc742817(v=ws.10).aspx

However, that was not the question.  You will need to move all 5 FSMO roles from the server at site A to site B.  Has this been done?
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Sarang TinguriaSr EngineerCommented:
check the DNS settings on the client /Server/DC follow below link and make currections accordingly

Best practices for DNS client settings on DC and domain members
http://abhijitw.wordpress.com/2012/03/03/best-practices-for-dns-client-settings-on-domain-controller/
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Rob WilliamsCommented:
You say both are terminal servers but is server A also a domain controller?
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ciosystemsAuthor Commented:
Yes. Both are DC's. We used Hamachi to help migrate from office to colo.
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