By Richard Speed
Publication Date: 2026-04-16 10:01:00
Microsoft will keep delivering security updates for old versions of Exchange Server and Skype for Business Server, after admitting that some customers aren’t ready to make the move to newer products.
Readers may remember the company previously announced that customers could sign up for six months of Extended Security Updates (ESU) for Exchange Server 2016/2019 and Skype for Business Server 2015/2019 after support for the products ended in October 2025.
Microsoft’s announcement of ESU for the products included the stern warning: “This period will not be extended past April 2026 (you do not need to ask).”
April is now upon us, and Microsoft has acknowledged that some customers have not moved to new products.
