The current operation master is offline the role cannot be transfered

ricno

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Apr 5, 2010
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Which role is missing? (There are five so called FSMO roles, of various importance.)

After identifying the missing role you would have to "seize" it. This has to be done with the ntdsutil command line tool.

You can check this Microsoft KB article for guidance in the seize operation. Let me know if you need more help.

http://support.microsoft.com/kb/255504