Hi Gordon
I did an upgrade from 6 to 7.1.3 (and update to 7.2) on a new hardware.
I installed a completly new SME7 on new HW.
Using LAT I recreated everything.
Started a RSYNC daemon on SME6 and copy ibays and users directory using rsync.
Because I was doing this on business hours, later I have to re-sync just before to switch to new server... but was a quick operation (a few changes from 2pm to 6pm!).
At the end I just copy other missing things (netlogon.bat, custom rules from templates-custom)...
When finished with copy I started an yum update to get new packages (7.1.3 -> 7.2) and I think post-upgrade events fixed all e-mail/ibays permissions.
Was a smooth transition!
Jáder