Possible solutions when Outlook doesn't recieve instant email notifications from the Exchange server.
Utility that extends the confirmation dialog shown when an addon wants to use Outlook, with more details about the addon.
Outlook stores the addresses and emails in a PST file, which one can backup and restore.
When deleting a mail in Outlook, then it can still be restored through the Exchange server.
Starting Outlook in safemode can be useful when troubleshooting Outlook.
Outlook can be minimized to the system tray so it will not be filling up on the taskbar.