Most easy way to get things done:
- Update to SolidCP First (as it can handle both 2010 and 2016)
- Install your exchange 2016
- Migrate accounts / OAB’s / PF’s etc over to the 2016 environment
- Flip the SolidCP Provider over from 2010 to 2016 (can only be done in the database)
Do note to check that your existing Exchange 2010 SP3 has segregation done correct for each ou the following should exist:
- Address book policy
- Offline Address book
- Global Address list
- Address list
- Rooms list
To finalize you can run the Public Folder fix (so all OU’s have their own Public folder with default PF set to avoid weird popups in outlook).
Regards,
Marco