The Exchange Server User Monitor (ExMon) RPC data indicates that the user '{3}' is performing online operations of type MAPI ...

The Exchange Server User Monitor (ExMon) RPC data indicates that the user '{3}' is performing online operations of type MAPI operation "{4}" which account for {0}% of this users MAPI CPU load. When a single MAPI operation type is responsible for a large percentage of the load, this may be an indication that the user is running an application that is behaving poorly.