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Did you contact your technical support? Or, if you're the technical support, please consult this very important Microsoft Knowledge Base article. http://support.microsoft.com/kb/555375 Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi You can read these relevant cases and try to post your thread like them. http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/387ee924-adcc-4541-aa37-504ad38f31e0 http://social.technet.microsoft.com/Forums/en-US/exchangesvrclients/thread/5ddb4de6-62f9-4859-acb8-b742763f7185 http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/b6222a41-8b62-4027-a706-28f1904eb9d7Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.