Troubleshooting Failed Diagnostic Tests

Troubleshooting Failed Diagnostic Tests

This KB is  intended for troubleshooting Diagnostic Tests with Failed results. If you encounter any errors displayed in the monitor that prevent the execution of Diagnostic tests, or if there is no data available for Diagnostic Tests, please refer this KB.
Follow the below steps to troubleshoot Failed Diagnostic Tests:
  1. Check the RCA for the Failed tests (From version 16630 onwards)
    1. Click on the red Health icon of the monitor to open the Root Cause Analysis pop-up window.
    2. Expand the Health status of the specific test that is down. (Example: Health of Distributed File System Check)
    3. Click on the Availability status of the specific test. (Example: Availability of Distributed File System Check)
    4. At the bottom of the same window, under the Root Cause Message heading you can find the reason why the specific test is down.
    5. Based on the displayed error, the customer can investigate the issue in their environment and resolve it.
    6. This can also be checked directly from the red Availability icon of the specific test in the Diagnostic Tests tab.

  2. Run the ADDiagnosticTests.ps1 script to check the full output from the AD server.
    1. Follow the steps in the KB article below to execute the script and review its output:

  3. Run direct command in the AD server.
    1. Open the administrative PowerShell on the relevant AD server.
    2. Execute the following command: dcdiag
    3. Review the output generated by the command.
Please note that we present the results exactly as received from the AD server. If customers encounter any issues related to the output from the AD server, they should either consult their own team or reach out to Microsoft for assistance.
Special Cases:
  1. In the event that the RID Master Accessibility Check fails in Applications Manager but passes when the direct command is executed on the AD server, please refer to the KB article provided below:
  2. Performance Polling:
    1. The Diagnostic Tests are mapped under Performance Polling which can be accessed through Settings -> Performance Polling -> Optimize Data Collection -> Monitor Type -> Active Directory -> Metric Name -> Table name.
    2. By default this is this is set to poll once every 60 minutes, although customers have the flexibility to modify this interval.
    3. If an alert is triggered by the Diagnostic Tests, and the error is resolved promptly upon checking direct commands, the Applications Manager will clear the alert only after the subsequent poll, following the polling settings.

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