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 'TaskQ' operation issued by this user took {0} seconds. If this operation is seen in conjunction with the MAPI operation 'QueryRows', in may indicate that the client is requesting a large number of items, or a large number of properties for each item. It is normal to see high cost and occasional high latency in this operation in conjunction with 'MoveCopyMessages', 'DeleteMessages', or other bulk MAPI operations.