1. Enable logging on the UM server using
http://technet.microsoft.com/en-us/library/bb430783(EXCHG.80).aspxPut them all to expert level.
2. Get ExTRA tracing -
Start collecting the Exchange UM Process Traces as indicated below:
Launch the Exchange Management Console
Double-click Performance Troubleshooter
Click Select a task
Click Trace Control
"Configure Trace File" Page
Accept the defaults for the following items:
- Select trace file location
- Select trace file name
- Enter max trace file size (MB)
Select trace file behavior:
- Sequential logging
Click on "Set manual trace tags"
"Set Trace Tags Manually" Page
Select the following Trace Types
Under "Components to Trace," scroll down, and click on MSExchangeUM
Under "Trace Tags," confirm all tags are selected (checking " MSExchangeUM" will enable all tags by default)
Click Start Tracing
3. Enable NetMon\Wireshark Tracing on Gateway, PBX and UM Server.
4. Reproduce the issue.
5. Stop Tracing
Stop collecting the Exchange UM Process Traces as indicated below:
Go back to the ExTRA window
Navigate to the binary trace log file (by default, it is located at C:\Program Files\Microsoft\Exchange Server\ExchangeDebugTraces.etl)
Send the resulting ExchangeDebugTraces.etl + NetMon traces to the support engineer you are working with.