Microsoft Exchange Performance Counters

Microsoft Exchange Mailbox Server RPC Client Throttling counters

The following table shows RPC client throttling counters.

Counter Name	Description
MSExchangeIS Client (*)\RPC Average Latency	RPC Average Latency is a server RPC latency, in ms, averaged for the past 1,024 packets.
MSExchangeIS\Client: RPCs Failed:Server Too Busy	The client-reported a number of failed RPCs (since the store was started) due to the server too busy ROC error.
MSExchangeIS\Client: RPCs Failed:Server Too Busy/sec	Shows the client-reported rate of failed RPCs (since the store was started) due to the server too busy ROC error.