If you see a permission error, contact your Office 365 admin to ensure ... associated with the shared mailbox. Once done, the Add option should be available. To create a new Outlook profile ...

To apply a retention policy to a shared mailbox, you need to create retention tags and a new retention policy, attach the tags to the policy, and then apply the policy to the shared mailbox.

Follow these steps to create a no-reply email address in Exchange Server/Microsoft 365: Log into the ... Recipients section, select Mailboxes and click on Add a shared mailbox.