Today we are announcing the availability of the 2023 H1 Cumulative Update (CU) for Exchange Server 2019 (aka CU13). CU13 includes fixes for customer reported issues along with all previously released...
Updated May 09, 2023
Version 3.0
Blog Post
Hello Exchange Team
We are running Exchange 2013 (i know) in full classic Hybrid mode and last weekend we were getting ready for upgrading to Exchange 2019. We used Exchange 2019 CU12 to extend the schema and we never did see any warning / error about running in Hybrid mode. All steps including schema, ad prep and domain prep went fine.
So is Exchange 2019 CU12 setup not recognizing Exchange 2013 Hybrid Mode?
Or if we don;t see any setup errors, do we assume everything is good and we don;t need to re-run the setup with the /TenantOrganizationConfig switch?
We did not install the actual Exchange 2019 servers yet, just prepped the AD.
When checking AD it looks like we are at the Exchange 2019 CU12 level as per following output
rangeUpper 17003
objectVersion (Configuration) 16760
objectVersion (Default) 13243
thank you