In a NON-replicated setup, do the changes to the GUID have an impact? Can I just put 2.3.10 on with a quick restart of the mailsystem, or is there More To It? I have 1.7TB of mail, about 40K mailboxes, about 10 million pieces of mail. So I don't want to do an upgrade which will kick off some huge rebuild-fest without planning. ian ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html