Manage shared mailbox settings in new Outlook - Microsoft Support If someone in your organization is sharing a mailbox with you, you might want the ability to manage the settings (such as Categories, Notifications, Rules, and Automatic Replies) for that mailbox You can do this in new Outlook by adding the mailbox as an account
Exchange Online – Block sign-in from shared mailboxes Blocking sign-in from shared mailboxes helps prevent unauthorized individuals from gaining access to these mailboxes By blocking sign-in, organizations can ensure that only authorized individuals with appropriate access rights can view and interact with the mailbox contents
Block Shared Mailbox Sign-ins Using PowerShell - LinkedIn While this method is super simple, it can be a bit tedious if you need to block sign-ins for multiple shared mailboxes So, I have included simple PowerShell scripts that handles different
Shared Mailbox always requesting Password from User The first thing I'd check would be Outlook connection status while the password prompt is still open That should tell you what it's trying to authenticate to which might give you some clues
Understanding Exchange Shared Mailbox Permissions In this blog, Jaap Wesselius deep dives into Understand Exchange shared mailbox permissions and walks you through how to grant permissions in different Exchange environments