Microsoft has announced the end of official support for Exchange 2016 and 2019, urging users to transition to either Exchange Online or the upcoming Exchange Server Subscription Edition (SE), launching later this year. Post-October 2025, the older versions will remain operational but will no longer receive critical security or technical updates, raising concerns about vulnerability and stability. Microsoft recommends upgrading from Exchange 2016 to 2019 first for a smoother transition to SE, with an additional focus on a streamlined upgrade process incorporated into future cumulative updates.
Microsoft's support for Exchange 2016 and 2019 will end, urging users to migrate to Exchange Online or the upcoming Exchange Server Subscription Edition.
Without critical security updates post-October 2025, Exchange 2016 and 2019 will become increasingly vulnerable and may face functionality issues.
Microsoft recommends Exchange 2016 users upgrade to Exchange 2019 before transitioning to the new Exchange Server Subscription Edition (SE) for security.
Migrating to Exchange Online or the new SE edition is crucial to avoid risks associated with unsupported versions, particularly concerning security vulnerabilities.
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