Migrating Windows 7 workstation to 2008 r2 domain RPC server unavailable

We are in the process of migration all user and computer accounts from a 2003 domain to a 2008 r2  domain. The XP workstations move with no problems. However we get an "Rpc server unavailable "error every time we try to migrate a Windows 7 workstation. What are we missing here? Any ideas where to look for the cause of this problem?
Eddie CrosbyAsked:
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piattndCommented:
When you say you're "migrating" them, what do you mean?  Are you upgrading your existing 2003 domain to 2008 or are you removing the machines from the 2003 domain and adding them to the new 2008 domain?
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unknown_routineCommented:
RPC error could be due to several reasons.


I suggest to go through the follwing page "RPC Quick Fixes"

To find and fix the issue:

RPC Quick Fixes:

http://social.technet.microsoft.com/wiki/contents/articles/4494.troubleshooting-the-rpc-server-is-unavailable.aspx
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Eddie CrosbyAuthor Commented:
Sorry. We are migrating users and computers from our existing domain to a new domain.
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Emmanuel AdebayoGlobal Windows Infrastructure Engineer - ConsultantCommented:
To start with RPC is an interprocess communication (IPC) method that is used by clients and servers to communicate with each other.

There might be issue with your Windows 2008 AD controller that Windows xp did not pick up but picked up by Windows 7. I would suggest that you use the following to diagnose you AD to ensure that all is ok.

repadmin /showreps
DCDIAG /TEST:DNS /V /E /F:<filename.log
NLTEST /DSGETDC:<netbios or DNS domain name>
Netdiag -v

http://support.microsoft.com/kb/2102154

Regard
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