Hi,
My main question is about AD schema upgrade. I have to run it manually outside of the DCPromo wizard. in the past, we've run into show-stopper errors during the schema upgrade, so now it gets its own day (production maintenance window). Does this need to be run on the 2012r2 FSMO role holder (PDC Emulator)? Just confirming. (Yes, I already know this is done autmatically via the dcpromo wizard, but I am not allowed to do this per my superior.)
and aside from that, anything I'm missing on my plan?
I have a 2012r2 environment and have been tasked with splitting up the domain upgrade to 2019 into 3 different days, separated by a week each.
- Upgrade schema.
- Introduce new DCs. (DCPromo) , migrate FSMO Roles to new PDC emulator, Time adjustment on new PDC to external. Shut down legacy DCs to test signing into domain. Fire back up after testing.
One week period between steps 2. and 3: to have all our third party applications, platforms point to new DCs for LDAP/auth, config settings, etc.
- DCPromo down legacy DCs. Then, upgrade forest and domain functional levels.
done.