Microsoft has reminded admins that Alternate 2016 and Alternate 2019 will attain the tip of prolonged help in October and shared steering for many who must decommission outdated servers.
Alternate 2016 reached its mainstream finish date in October 2020, whereas Alternate 2019 reached the tip of mainstream help on January 9, 2024.
“On October 14, 2025, 9 months from today, Exchange Server 2016 and Exchange Server 2019 reach end of support,” the Alternate Staff stated.
“Customer installations of Exchange 2016 and Exchange 2019 will of course continue to run after October 14, 2025; however, due to the upcoming end of support date and potential future security risks, we strongly recommend customers act now.”
After October 14, 2025, Microsoft will not present technical help for issues with Alternate 2016 or Alternate 2019, together with technical help and bug fixes for newly found points that will affect server usability and stability.
The corporate may even cease issuing time zone updates and safety fixes for found vulnerabilities that will make the server susceptible to safety breaches.
Improve to Alternate On-line or Alternate Server SE
Microsoft advises admins to migrate to Alternate On-line (out there as an Workplace 365 subscription or a stand-alone service) or put together to improve to Alternate Server Subscription Version (SE) when it rolls out in early H2 of CY2025.
Admins can carry out an in-place improve from Alternate Server 2019 to Alternate Server SE, similar to putting in a Cumulative Replace (CU).
“To enable quick and easy in-place upgrades from Exchange Server 2019, we have purposely either pulled new features forward into Exchange Server 2019 CU15 or pushed them to Exchange Server SE CU1 or later, leaving the Exchange SE RTM to be a branding update that introduces new lifecycle and support policies,” the Alternate Staff stated in September when it offered extra data on Alternate Server SE upgrades.
“By moving to Exchange Server SE RTM, your servers are on the supported path to Exchange SE CU1. Once Exchange SE CU1 is released, all older versions will be out of support.”
Redmond’s documentation web site gives detailed steering for world admins on Microsoft 365 migration and helps them determine on the Alternate On-line migration path.
