Submission Queue Length monitor in exchange_monitor probe is unable to retrieve the correct counter from Windows Performance Counters.
We can see in Exchange 'Get-Queue' command that the Submission queue is not zero. The same can be seen via Windows Perfmon > MSExchangeTransport Queues > Submission Queue Length > _total, which reports the correct number.
When we check the perfmon and exchange_monitor probes it is always reporting 0 messages in the queue.
Any UIM version
This is caused by an issue in the exchange_monitor probe configuration file.
To resolve this problem please deactivate the exchange_monitor probe and perform the following steps:
1- take a backup of the exchange_monitor.cfg file
2- edit this file and find the 'Submission Queue Length' section
3- change the following item from/to:
x_instance = _Total
instance = _total
4- start the exchange_monitor probe and check the results