Hi, can anyone confirm if I can cleanly uninstall Exchange 2003 then cleanly install Exchange 2013 in the same Domain (as an Exchange 2003 to 2013 upgrade scenario)? We will have all mail data exported to PSTs prior. Most of what I see posted says this is a possible scenario but people don't recommend because of the data migration part. However, there will be no issue with us moving all mail data to a pst now then importing all data to Exchange 2013 via Outlook later.
Current environment has approximately 30 people on a Windows 2008 domain controller with a separate Exchange 2003 server and all is working fine. All users use Outlook 2007 or above and are actually downloading their Exchange email to a PST file already (weird legacy setup). The current one Mailbox store is only 2.3GB and we will make sure to export any other data (including Public Folders).
Our goal is to setup a Windows 2012 server with an additional 2012 domain controller vm and an Exchange 2013 vm. The current 2008 domain controller will stay in-tact so that we have DC replication but we will eventually decommission the Exchange 2003 server (not a domain controller).
Thanks in advance,