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Bobbers's avatar
Bobbers
Copper Contributor
Jul 01, 2025

Agent install error

Hi Everyone,

 

One of the servers running the agent was failing to update so I attempted a reinstall.  During install it fails / rollsback with an error in the log stating "failed connecting to service.  The issue can be caused by a transparent proxy configuration".

 

The device does use a proxy set via netsh, and I've tried specifying it on the command line of the install.  I have read elsewhere that this can be related to SSL inspection or an issue with Root CAs on the device.  I know there is no inspection going on in this case.  I have compared the Root CA list on this device to working devices and don't see anything related to Microsoft that is different.

 

Any ideas?

Sensor

1 Reply

  • KBraun94's avatar
    KBraun94
    Copper Contributor
    Aug 05, 2025

    Hello Bobbers​, 

    I faced similar problems. Please do that:

    • Copy this Folder of a Server with no problems "C:\Program Files\Azure Advanced Threat Protection Sensor" to the Server / Sensor with problems
    • If the Server is also an VM, do that: 
    • Restart Server
    • Download Sensor from Security Center
      • System ; Setting ; Identity ; Add Sensor ; Download Package and copy Key + copy on / at Server
    • Execute Setup and paste key

    See the official documentation of MS ->https://learn.microsoft.com/en-us/defender-for-identity/troubleshooting-known-issues#vmware-virtual-machine-sensor-issue

     

    Best regards 
    Kevin

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