troubleshooting Question

E-mail slow down with RPC cancel request dialog box seen at the Outlook clients.

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LenardP asked on
ExchangeOutlook
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Users have been seeing some e-mail slow down and RPC cancel request dialog box on their Outlook 2003 clients.  In order to see if the Exchange 2003 Server is having problems I changed to the mdbperfx.dll (in Performance Monitor).  This added a number of new counters which I am unable to find any detailed information about.  A few that I am using are listed below.
FXGetBufferRopsCalledPerSec
FXGetBufferRopsDeniedPerSec
FXGetBufferCurrentCallerCount
FXGetBufferCurrentUsersExecting
FXGetBufferRopsCalled

I am seeing a lot of activity on the FXGetbufferRopsCalledPerSec and a little on FXgetBufferCurrentUsersExecting and nothing on FXGetBufferRopsDeniedPerSec.  I have the one line discription of these counters from KB Article 818481 but need more.

This is a large Exchange 2003 system with a few thousnad users runing clients with Outlook 2002 and Outlook 2003.  I have been following the guidelines in KB Articles 839862, 916783, 9015184 and a few more to troubleshoot the problem.

FXGetBufferRopsDenied sits at about 775.  I am not sure how to reset this value or where it is comming form.  I would think I should see some activity on the FXGetBufferDeniedPerSec counter if RPC handling was the problem.

Any information would be helpfull.
Thanks,
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