UPDATE 2/12/21
The Exchange Sustained Engineering Team continued servicing all customer issues for Exchange 2016 that were opened with Microsoft by the end of Mainstream Support, which was Oct 13, ...
Updated Feb 12, 2021
Version 12.0
Blog Post
Hello, I wasn't sure exactly where to pose this question: We are currently running Exchange 2016 on prem in a hybrid environment with O365. Most of our mailboxes are in the cloud but we do have an on-prem database with some on-prem mailboxes.
We are planning on upgrading to Exchange 2019 very soon. I was reading a detailed series of blog posts that talk about installing Exchange Server 2019, and they mention having to prepare Active Directory and extending the AD schema for Exchange 2019. Is this true even if we are running Exchange 2016? Do we still have to prepare AD and extend the schema, or does that only apply if you're installing Exchange for the very first time in your organization?
Thank you!