How do I access quarantined messages in a shared mailbox
To access and review quarantined messages of a shared mailbox, follow these steps:
1. Visit https://security.microsoft.com/quarantine
2. If you're not already logged in, log in using your own account
3. Click on the filter icon
4. Type the shared mailbox email address in the Recipient address
5. Click Apply
You should now see any quarantined messages in the shared mailbox account.
Important: Please use caution when reviewing a releasing quarantined messages. Many quarantined messages were sent there because they were detected as potentially malicious.