Microsoft has announced that support for Exchange Server 2016 and 2019 will cease on October 14, 2025. Administrators must act to prevent security vulnerabilities that arise from continued use of these unsupported versions. Migration to Exchange Server Subscription Edition (SE), expected later this year, or to Exchange Online is recommended, as administrators will no longer receive security updates after the end-of-support date. This forces organizations towards cloud solutions or competing services, raising questions about Microsoft's strategy in timing the release of Exchange SE just before the end of support.
Microsoft's warnings highlight the risks of continuing to use unsupported versions of Exchange Server, emphasizing the urgency for IT administrators to begin planning their next steps.
With the end of support for Exchange 2016 and 2019 on the horizon, administrators face a critical need to migrate to supported versions to maintain security and compliance.
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