Consider the following scenario:
- You create a Microsoft Skype for Business meeting.
- You set the These people don't have to wait in the lobby option on the Skype Meeting Options page to Anyone (no restrictions).
- Some users dial into the meeting, and then wait in the lobby.
- You join the meeting through a Skype for Business client.
This issue occurs because the MAPI property of the meeting item in Microsoft Outlook is old.