The certificate enrolled to your device should have the Intune Device ID as Subject-CN:

This is how that looks like if you request the client certificate through Intune.
Based on the username, ClearPass cannot request the Intune information.
------------------------------
Herman Robers
------------------------
If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
------------------------------
Original Message:
Sent: Dec 18, 2023 04:01 AM
From: JoseMi_Cruz
Subject: CPPM 6.10 & InTune Extension V6
Hi dudes,
We are woring on a brand new project integrating CPPM with InTune extensión, V6. We are having some problems after configuring Authrntication source as we are having "Clearpass intune : HTTP attribute query returned error=404".
The filter query is as following the integration documentation "%{Certificate:Subject-CN}" and every single time the same alert on Access Tracker.
The certificate issued is for username, nothing about machine, nor devide ID.
Any suggestion about how to fix that problem? I am not used to use variables so any help would be appreciate.
Regards
JoseMi
------------------------------
JoseMi Cruz
------------------------------