Org-wide Teams announces that shared mailboxes "joined the team".
Shared mailboxes are not a real person and it is confusing with announcements in the General channel of the team that "<shared mailbox> joined the team."
If you go to Manage Team shared mailboxes are not listed as members.
Expected that only users (a person with a license) should be announced "<user> joined the team."
I second the "provide the capability to hide all user joined/left messages in the conversation view of an org-wide team."
furthermore, provide the capability to hide all user joined/left messages in the conversation view of an org-wide team.
Users leaving is a particularly sensitive area. We have lots of users contacting support to complain that ex users are re-joining the org-wide team and despite these account being disabled on premise, the opinion is formed that IT are not properly disabling accounts and we are not secure. It's a terrible look courtesy of the org-wide teams treatment of accounts