We're nearing the end of an Exchange 2007 mailbox migration project. This was a hardware only refresh for the mailbox servers - Exchange 2007 to Exchange 2007.
All mailboxes have been migrated, we've moved the offline address book and public folders. Clients (Outlook 2007) are connecting successfully and being reconfigured with the new server address.
However, due to an office move, we can't leave the old Mailbox server running for much longer and I know a number of users haven't launched Outlook since their mailbox was moved (holiday etc).
What is the best/correct way to mange updating these remaining clients when we decommission the old mailbox server?