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Anyone ever see this: Windows cannot verify username unique because following error occurred while contacting the global catalog

I am trying to add a user to AD and I get the following error message:  Windows cannot verify that the user name is unique because the following error occurred while contacting the global catalog:  The server is not operational.  Windows will create this user account, but the user can log on only after the user name is verified to be unique.  Make sure the global catalog is available.  For more information about troubleshooting this issue, see Windows Help.


I just recently demoted a dc and promoted another server to dc.  I am getting this error on my recently promoted dc.  Any suggestions would help.

Thanks
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stini12
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stini12
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Do you have a Global Catalog (GC) server?  By default it's the first server.  I'm not sure it's forceably created on another server when you demote it; I don't think so.
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stini12Author Commented:
I have a forest domain blah.lcl and a child domain blah.blah.lcl.  
How do I check if this dc is the global catalog server?  its part of the blah.blah.lcl domain.
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stini12Author Commented:
I have a forest root domain of datamail.lcl and a child domain of winnt.datamail.lcl.  The global catalog server is within the datamail.lcl forest root domain.  I do not see any dc set as the global catalog server within the winnt.datamail.lcl child domain.  Should there be a global catalog server in both domains?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Read more about the GC - if you understand it, you should be able to find which servers are the GC's and how important they are:
http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/TechRef/171486df-02f6-4bf8-87ad-0d05b26329d6.mspx
http://www.petri.co.il/configure_a_new_global_catalog.htm
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