Video: What is Skype for Business? - Microsoft Support
https://support.microsoft.com/en-us/office/video-what-is-skype-for-business-3a21eca4-434d-41f1-ab06-3d4a268573b7
webSkype for Business lets you connect with co-workers or business partners in your company or around the world. Start conversations with IM, voice, or video calls. See when your contacts are available online, in a meeting, or presenting. Set industrial-strength security for meetings. Broadcast online to a large audience.
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