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ATPDocs/troubleshooting-known-issues.md

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## VMware virtual machine sensor issue
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If you have a Defender for Identity sensor on VMware virtual machines, you might receive the health alert **Some network traffic is not being analyzed**. This can happen because of a configuration mismatch in VMware.
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If you have a Defender for Identity sensor on VMware virtual machines, you might receive one or both of the following health alerts **Some network traffic is not being analyzed** and **Network configuratuin mismatch for sensors running on VMware**. This can happen because of a configuration mismatch in VMware.
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To resolve the issue:
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Validate that the computer running the sensor has been granted permissions to retrieve the password of the gMSA account. For more information, see [Grant permissions to retrieve the gMSA account's password](deploy/create-directory-service-account-gmsa.md#prerequisites-grant-permissions-to-retrieve-the-gmsa-accounts-password).
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### Cause 2
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The sensor service runs as *LocalService* and performs impersonation of the Directory Service account.
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For more information, see [Run a silent installation with a proxy configuration](install-sensor.md#run-a-silent-installation-with-a-proxy-configuration) and [Install the Microsoft Defender for Identity sensor](deploy/install-sensor.md).
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> [!IMPORTANT]
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> Microsoft recommends that you use the most secure authentication flow available. The authentication flow described in this procedure requires a very high degree of trust in the application, and carries risks that are not present in other flows. You should only use this flow when other more secure flows, such as managed identities, aren't viable.
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> Microsoft recommends that you use the most secure authentication flow available. The authentication flow described in this procedure requires a very high degree of trust in the application, and carries risks that aren't present in other flows. You should only use this flow when other more secure flows, such as managed identities, aren't viable.
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>
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## Sensor service could not run and remains in Starting state
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## Sensor service couldn't run and remains in Starting state
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The following errors will appear in the **System log** in **Event viewer**:
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- The Open procedure for service ".NETFramework" in DLL "C:\Windows\system32\mscoree.dll" failed with error code Access is denied. Performance data for this service won't be available.
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- The Open procedure for service "Lsa" in DLL "C:\Windows\System32\Secur32.dll" failed with error code Access is denied. Performance data for this service will not be available.
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- The Open procedure for service "WmiApRpl" in DLL "C:\Windows\system32\wbem\wmiaprpl.dll" failed with error code "The device is not ready". Performance data for this service won't be available.
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- The Open procedure for service "Lsa" in DLL "C:\Windows\System32\Secur32.dll" failed with error code Access is denied. Performance data for this service won't be available.
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- The Open procedure for service "WmiApRpl" in DLL "C:\Windows\system32\wbem\wmiaprpl.dll" failed with error code "The device isn't ready". Performance data for this service won't be available.
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The Microsoft.TriSensorError.log will contain an error similar to this:
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