We would like to decommission an Exchange 2003 server. The server in question is the one and only Exchange 2003 server on a 2003 domain infrastructure. There are 2 other DC’s which are 2012, and will be used to fully upgrade the domain to 2012 at a later date.
E-mail has recently been migrated to 365 hosted e-mail with AD integration through DirSync.
All mailboxes have been deleted with the ‘SMTP’ and ‘System Attendant’ entries remaining (see attached screenshot - Exchange Mailboxes).
When I attempting to uninstall Exchange through the ‘Microsoft Exchange Wizard’ I receive an error indicating that ‘One or more users currently use a mailbox store on the server’ (see attached screenshot - Microsoft Exchange Installation Wizard).
In AD, there are a number of Exchange items that have e-mail addresses associated with them, but I assume that these will be removed when the Exchange installation is complete (see attached screenshot - Exchange AD Items)
Can anyone provide step by step instructions on how to decommission and remove the Exchange 2003 server from the domain?