An Azure communication platform for deploying applications across devices and platforms.
Thanks for reaching here! Could you please elaborate your scenario to help you better on this, As mentioned in the document that :
"A Communication Service user won't be admitted to a Teams meeting until there is at least one Teams user present in the meeting. Once a Teams user is present, then the Communication Services user will wait in the lobby until explicitly admitted by a Teams user, unless the "Who can bypass the lobby?" meeting policy/setting is set to "Everyone".