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Intune Extension v5 Error getting device list. self signed certificate in certificate chain

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  • 1.  Intune Extension v5 Error getting device list. self signed certificate in certificate chain

    Posted 26 days ago
    I'm trying to set up the v5 intune extension and I get this error when trying to sync:

    [2021-09-30T11:27:09.898] [ERROR] Intune - Error getting device list. self signed certificate in certificate chain

    I suspect this is because we're doing SSL decryption on our firewall since we've seen similar issues before. The problem is I don't know what URL the extension is trying to reach to whitelist it from decryption. The extension IP address doesn't show up in the firewall logs, and I tried whitelisting graph.windows.net but that didn't help.

    Another thread suggested using curl against the extension address but curl doesn't exist as a command on the cppm. Any ideas what to try?

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    Chalupa Supreme
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  • 2.  RE: Intune Extension v5 Error getting device list. self signed certificate in certificate chain
    Best Answer

    Posted 26 days ago
    Try whitelisting graph.microsoft.com as that's the API endpoint.

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    James Andrewartha
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  • 3.  RE: Intune Extension v5 Error getting device list. self signed certificate in certificate chain

    Posted 25 days ago
    That did the trick. I had to reinstall the extension after whitelisting it but it started pulling devices down after that, thanks for the help!

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    Chalupa Supreme
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