http://blogs.technet.com/dst2007/archive/2007/03/05/dst-2007-bulletin-unable-find-mailbox-timezone-error-0x800004005.aspxDST 2007: Unable find mailbox timezone:Error 0x80004005 This article deals with understanding and troubleshooting the famous " Unable find mailbox timezone:Error 0x800004005 " while extracting time zone information from users during the extraction modeen-USCommunityServer 2.1 SP1 (Build: 61025.2)