| EDIT 4/15/2026: We have now announced Period 2 of this ESU program which needs to be purchased separately. If your organization requires SfB ESU between May and October 2026, you will have to re-purchase the ESU. Please see Announcing “Period 2” for Skype for Business Server 2015/2019 Extended Security Update (ESU) Program | Microsoft Community Hub for more information. With both Skype for Business 2015 and 2019 going out of support in October 2025 , we have heard from some of our customers… |
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