Thanks in advance!
You can run a 2019 or 2016 DC and still have exchange 2010 - however I didn’t test with the domain and direct level higher than 2008r2.
I don’t like the idea of even attempting an in-place upgrade of a DC.
And I assume that Exchange 2010 is NOT installed on the DC that you’re going to retire or attempt to upgrade.
Yes Exchange2010 t will work but dont forget it is out of support.
And migrate from FRS to DFSR before promoting 2019 or 2016server to DC2019 or DC2016.
It's worse than being out of support - they have wound up with a disjointed name space between their email domain and their LAN. Didn't have any impact until fairly recently. Moving to the cloud will make the issue moot..
-->promote it to a DC then decommission the existing 2008 DC
Promoting a 2019 server to DC before migrating from FRS to DFSR will create replication issue.
Also, I am not touching the exchange server - my question was if it would continue to work in a domain with a 2019 DC - that is the box I am replacing.
Supported vs possible are two different things.
I would recommend doing a P2V into a segregated test environment and test what you plan to do before doing it in a production environment.
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