You'll see a notification at the top of the window when you aren't connected to the Skype for Business server, and the buttons to start conversations and join meetings will be disabled. In the People list, select the user and then select the More Options (…) button. When in a meeting or call, you can easily mute someone's microphone, make them a presenter or attendee, or remove them from the meeting. You can turn this off by clearing Update my status based on my calendar information in General page of Preferences dialog box. Status from your Outlook calendar Skype for Business will automatically update your status to indicate when you are in a meeting or busy based on your Outlook calendar. If you find a bug, please report the issue using Help\Report an Issue. The release has a lot of improvements that you've been asking for, so we really would like to have you try it and give us feedback. We're excited to release new Insider builds (both Slow and Fast).