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Microsoft Exchange Performance Counters

Microsoft Exchange Client Access Server Client Activity counters

The following table shows client activity counters.

Counter Name Description
MSExchangeIS\RPC Client Backoff/sec Indicates the rate at which client backoffs are occurring. Higher values may indicate that the server may be incurring a higher load resulting in an increase in overall averaged RPC latencies, causing client throttling to occur. This can also occur when certain client user actions are being performed. Depending on what the client is doing and the rate at which RPC operations are occurring, it may be normal to see backoffs occurring.