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Decommissioning Exchange Server 2016

Exchange 2016 is approaching the end of extended support and will be out of support on October 14th, 2025. If you are using Exchange Server 2019, you will be able to in-place upgrade to the next version, Exchange Server Subscription Edition (SE), so Exchange Server 2016 will need to be decommissioned at some point.This article will focus on the removal of Exchange 2016 from an environment which already has Exchange 2019 installed. We will not focus on any of the steps already documented for upgrading to Exchange 2019. To get those details, see the Exchange Deployment Assistant and create a custom step-by-step deployment checklist for your environment. Also check out the Exchange Server documentation for details on upgrading to a newer version of Exchange Server.If you plan to stay on-premises, we recommend moving to Exchange 2019 as soon as possible. Only Exchange 2019 will support in-place upgrades to Exchange SE, marking the first time in many years that you can perform an in-place u…