Exchange management; Covers version support, mail flow, access, and recovery preparation. On-premises Exchange Server and Exchange Online are not the same operating model.
First, it should be determined which Exchange version is used?
According to Microsoft, standard support for Exchange Server 2016 and 2019 ended on October 14, 2025. Organizations working on these versions should plan migration to a supported target by separately evaluating special support arrangements, if any.
How to prepare a transition decision?
Mailboxes, application senders, domains, and hybrid dependencies are inventoried. On-premises options powered by Exchange Online meet the same needs with different responsibilities; Target selection must be made based on the current environment.
Information to be collected in Exchange evaluation
- Record the server version, build number, and installed updates.
- List mailboxes, app submissions, and hybrid connections.
- Plan for mail flow, client access, and return scenarios during migration.
Reference source: Microsoft Learn — Exchange 2016/2019 end-of-support roadmap. Implementation details should be evaluated according to the current environment and current regulations.
Related resources
For application and enterprise support coverage Exchange Mail You can review the page.
Official sources
Technical documentation and legislation may change; The relevant version and current text should be checked before application.
Frequently Asked Questions
Will the server shut down immediately when support ends?
End of support does not mean automatic shutdown; Standard support and update terms vary. Just because it works does not mean it is supported.
Is Exchange Online the same as an on-premises server?
No. Hosting, updating, and management responsibilities are different; Transition dependencies should also be examined.