Event ID - 9641

Event Id9641
SourceMSExchangeIS Mailbox Store
DescriptionUser 's averaged RPC latency for the RPCs in the past minute(s) is seconds (which is greater than the threshold of seconds).
Event InformationAccording to Microsft:
Cause :
An Outlook client is reporting long latency remote procedure calls (RPCs) to this Exchange server. Potential causes include:
1.Server resource bottleneck (for example, disk or CPU)
2.Network problem.
3.Problems on the client machine.
Resolution :
Determine if the long latency is on the Exchange server or is external to the Exchange server.
1. Look at the averageRPC Latency view to determine how long the server is taking to process RPC requests.
2.look at the Number of Slow RPC Packets view to see how many RPCs took longer than two seconds to process on the server.
If the average RPC latencies is low and there are few long RPCs, this is an indication that the problem is external to the Exchange server, such as a network bottleneck.
Reference LinksEvent ID 9641 from Source MSExchangeIS Mailbox Store

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