
Users can be moved directly from Skype for Business Server to Teams Only after configuring Skype for Business hybrid with Microsoft 365 or Office 365.Coexistence modes enable customers to operate Skype for Business Server/Teams side-by-side experiences until they are ready to move users to Teams Only.Customers will not be able to move online users out of Teams Only mode after retirement.This includes support for third-party audio-conferencing providers, Skype for Business Online Cloud Connector Edition, hybrid voice configurations, and Skype Meeting Broadcast. Services that integrate with Skype for Business Online will not be supported beyond the Jretirement.In Microsoft’s most recent blog post about the matter, they drew customer attention to a number of key changes, which include:


The reminder says that it’s going away as of July 31, 2021, so you’ll need to complete your migration to Microsoft Teams (or an instance of Skype for Business Server), or have some other solution in place by then if you don’t want to suffer any business disruptions.

If you’re still using Skype for Business at your firm, be advised that Microsoft recently sent another friendly reminder out to all users of the service.
