How to Steps
Shared Mailbox Not Updating
This will fix issue’s with a shared mailbox not auto updating.
Outlook – Windows
You will be able to receive mail in the inbox right away and will no longer have to manually send/receive with the folder/inbox.
1. File>Account Settings>Under the Email Tab highlight name of the mailbox and select change.
2. Select More Settings.
3. Select Advanced Tab and highlight the shared mailbox in question.
4. Make sure under cached Exchange Mode Settings that all are unchecked.
5. If the shared mailbox isn’t present under the Advanced settings, uncheck cached exchanged mode for the main account.
This will connect differently and may lose any cached emails that have not updated to the Server. Double check that the Outlook via web has the most current changes and that everything looks correct.