Skype for Business upgraded to Teams 11-8-2021 On Monday, November 8, 2021, Microsioft is automating the upgrade for Skype for Business users to Microsoft Teams. Microsoft notified users on Monday, November 1, 2021, through Skype for Business application, that they will soon be upgraded to Teams. Readiness Guide: Get started upgrading Skype for Business to Teams - Microsoft Teams | Microsoft Docs