Microsoft is extending its security update programs for Exchange Server 2016, 2019, and Skype for Business 2015, 2019, until April 2026 to assist customers during their migration. This includes an additional 6-month Extended Security Update for Critical and Important security updates after October 14, 2025. Customers need to register for updates and must inquire about costs with account representatives. The extension is intended as a one-time offer, with no possibility of further extensions beyond April 2026, as the company acknowledges the need to address customer migration challenges.
Microsoft has announced an extension of its security update programs for Exchange Server 2016, 2019, and Skype for Business 2015, 2019, until April 2026.
The Extended Security Update (ESU) program will provide security updates for any Critical-or-Important-rated vulnerabilities that arise after October 14, 2025, but availability is not guaranteed.
Customers must sign up for the Extended Security Update service to receive notifications about applicable patches, and pricing information is available through discussions with account teams.
This one-time offer for Extended Security Updates will end on April 14, 2026, with Microsoft indicating no further extensions or considerations will be made beyond that date.
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