can not add user to group

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hello everyone,

when try add user group error:

"the program cannot open required dialog box because cannot determine whether computer named "<computer name>" joined domain."

after closing error, receive:

"undable display user selection dialog. rpc server unavailable."

how fix rpc server? ideas?

refer http://support.microsoft.com/kb/816818

hth
marcin



Windows Server  >  Directory Services



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