Exchange 2010 SP3 RU29 with 2019 Domain Controllers
Hello, I wonder if someone can give a bit of clarification regarding the Microsoft's matrix for Exchange 2010 support here. https://docs.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019 I am currently upgrading domain controllers from 2008 R2 (2 of them) to 2019, and have already promoted and setup 2 new ones. Domain and Forest level is still set to 2008 R2. All FSMO roles have been transferred and Exchange 2010 successfully picked up and using see the new 2 2019 DCs. Now Microsoft's site says it does not support 2019 environment? This is the part that concerns me, because it clearly does. I haven't demoted 2 old DCs yet, but based on all info I could find Exchange is already using 2019 DCs. Also all flags look proper in Exchange Discovery event viewer (event 2080) Process STORE.EXE (PID=5108). Exchange Active Directory Provider has discovered the following servers with the following characteristics: (Server name | Roles | Enabled | Reachability | Synchronized | GC capable | PDC | SACL right | Critical Data | Netlogon | OS Version) In-site: CDG 1 7 7 1 0 1 1 7 1 for both new 2019 DCs. Should I be concerned with demoting 2 old ones? Based on the matrix Exchange 2010 should work with 2016 functional level, so if I were to raise it to that level after demoting the old ones everything should still be OK? Is there another test I can run to make sure exchange will still be fine after demoting old ones? I was thinking explicitly excluding 2 old ones using -StaticExcludedDomainControllers on the exchange to make sure its not using them at all? Will that be sufficient to make sure? I have attached a screenshot from exchange console with more info. It would be nice to find why Microsoft is saying that Exchange 2010 is not able to communicate with 2019 DCs... Thanks