Microsoft confirm the paid End of Support date for Exchange Server 2016/2019 and Skype for Business Server 2015/2019 as the end of October 2026.

The original deadline of 14 October 2025 was extended with a double dose of ESUs ultimately lasting for an additional 12 months. Microsoft have reiterated that this phase of support is final, recommending (unsurprisingly!) upgrading any installations of Exchange Server and Skype for Business Server to a supported version. Subscribers will find the full details explained across LicenseVerse. The related article for Exchange Server is here: https://bit.ly/4hpSwEi, and Skype for Business Server here: https://bit.ly/3VbbSo4

Microsoft announce a “Period 2” 6-month extension for the special Extended Security Updates for Exchange Server 2016/2019 and Skype for Business Server 2015/2019.

Customers who want ESUs in the new May 2026 – October 2026 period should note that Period 2 isn’t an extension to the first period of ESUs, it’s a further purchase.

Find the announcement for Exchange Server here: https://bit.ly/4sNf1pi and Skype for Business Server here: https://bit.ly/4dWfgdY.