We are in the process of migrating one of our customer from VM to UM but not sure how to migrate the users here is the scenario, customer currently has Exchange 2003, Unity 4.0.5 in mixed VM/UM licensing .
They are upgrading Exchange 2003 to 2007 but their Exchange 2003 server will be there till they migrate all the users and VM mailboxes to Exchange 2007 server.
Customer has built Unity 5.0 on new server with Exchange 2007 as partner server.
Now they have Unity 4 and 5 , for Unified users GSM worked great to move from 4.x to 5.x server but not sure how to migrate the VM only user from Unity 4.x Exchange 2003 to Unity 5.x Exchange 2007 server.
Hope I didn't confuse anyone.
Thanks for your help.