Do you mean you want to teach online in Skype for Business online?
Skype for Business online will be retired on July 31, 2021. If it is your first time to deploy Skype for Business, we recommend you try to experience Microsoft Teams. Teams supports teacher-to-teacher collaboration as well as class collaboration and communication. In short, it is the one tool that can help with educators' administrative and classroom tasks, saving teachers time and teaching students future ready skills. For more details, you can refer to:
https://education.microsoft.com/en-us/resource/d5b62e3e
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