Forum Discussion
Exchange Server 2016 / 2019 coexistence CU update
Hi, We are running Exchange Server 2016 CU19 and Exchange Server 2019 CU14. We want to install the latest CU for Exchange Server 2016. Can we do this with Exchange Server 2019 CU14 already install...
Thanks for your reply!
So the AD Schema should already be up to date because of the Exchange server 2019 CU 14 which is the latest CU.
When we want to upgrade the Exchange server 2016 from CU 19 to CU 23, there are AD schema updates required. But I am wondering how this will react because of the schema already on the latest version.
Will it just skip the schema updates?
Microsoft don't support two different versions of Exchange in the same organisation for extended periods (only supported while migrating to the new version), so I'd recommend decommissioning the Exchange 2016 servers and building new Exchange 2019 servers.