The Exchange Server User Monitor (ExMon) RPC data indicates that the user '{3}' had a long-running MAPI operation of type ...

The Exchange Server User Monitor (ExMon) RPC data indicates that the user '{3}' had a long-running MAPI operation of type '{4}'. The longest-running restriction issued by this user took {0} seconds. The 'Restrict' operation can cause view creation on the server and may result in a significant impact to end user performance. Consider upgrading this user to Outlook cached mode. Also, consider investigating the application that caused the restriction.