Microsoft Exchange Performance Counters

Microsoft Exchange Client Access Server Address Book Service counters

The following table shows Exchange 2010 address book service counters.

Counter Name	Description
MSExchangeAB\NSPI RPC Browse Requests Average Latency
MSExchangeAB\NSPI RPC Requests Average Latency	Shows the average time, in ms, that NSPI requests took to complete during the sampling period.
MSExchangeAB\Referral RPC Requests Average Latency	Shows the average time, in ms, that referral requests took to complete during the sampling period.