That's because this application comes preinstalled with those operating systems. If you are using Windows 10 Anniversary Update, or Windows Server 2016, you should already have Windows PowerShell 5.1. Skype for Business Online, excluding the service operated by 21Vianet in China, was retired on July 31, 2021. Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams.
If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today. If you haven't upgraded your Skype for Business Online users yet, they will be automatically scheduled for an assisted upgrade.
Skype for Business Online operated by 21Vianet in China will be retired on October 1, 2023.
