Thanks for asking for clarification and sorry it I was not clear on that. So, with Exchange (on-prem or cloud) You can setup Distribution Lists. This amounts to a large group of people and I can see at least one point of confusion. You can also setup the
equivalent of a generic mailbox that isn't attributed to any one user (although it may still create an AD identity for the "shared" mailbox, I'm not sure) but one to which multiple real people users have access. This allows multiple people to have control
over meetings scheduled for a team without each of them having to grant rights to each others calendars. Team members add this additional account to outlook and can use it just like they would their own.
So, we have teams that setup a "team" mailbox and then grant all team members access to that mailbox. Currently it is used exclusively for shared access to change and manage meetings. If the team lead is out or suddenly unavailable, a designated backup can
make changes, if needed.
When meetings are setup using the mailbox/account that is shared by team members, the appointment shows up on the Teams calendar, but no "Join" button is available. The "Join" button does NOT show up on the teams calendar anywhere and not even in the upper
right hand corner where it normally does when the appointment/meeting is selected on the Teams Calendar. The appointment shows up, just not the "Join" button.
What does show up is the appointment itself, and when opened has the typical "Microsft Teams Meeting" link which can be clicked on, and of course, joined. I was just finding it odd that when appointments are scheduled using a shared mailbox, we get no "Join"
button but yet both Outlook and Teams do show the Teams Meeting details in the appointment even though no convenient "Join" button is provided like it is when using our normal Outlook user account and/or Teams itself to schedule the meeting.
Jared