We are currently planning and testing to reorganize a forest. In the process we will need to take down and exchange server and and reinstall to another server in a different domain. This exchange server does not have any user mailboxes on it yet. When I try to uninstall, it says that I cannot because there is a postmaster account on this server. Also it says that I still have mailboxes on the server. The only mailboxes are the system mailboxes, and I have not manually created a postmaster mailbox. Any ideas?