Transferring FSMO roles from old windows 2003 server to new 2008 R2 server.

When transferring FSMO roles from old windows 2003 server to new 2008 R2 server, does all users have to be off the servers or can this be done anytime?
ItregulatorsAsked:
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becraigCommented:
The only real concern you have is network connectivity.


Once you do not have any connectivity issues you will be ok.
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Natty GregIn Theory (IT)Commented:
Its best to do with everyone off
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I would ask nattygreg WHY?

I've never given it a second thought - FSMO role transfers are very simple and should not be a problem.  There are lots of things I'm conservative with, but in 20 years of experience and using AD since it was released in 2000 (before really), transferring FSMO roles in a healthy domain should have NO IMPACT WHATSOEVER on users, logged on or not.

I WOULD run DCDIAG /C /E /V on all DCs FIRST and resolve any unexplained errors, but other than that, once you have a confirmed healthy AD, I wouldn't worry about users.
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ItregulatorsAuthor Commented:
Good job...
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