Conditional Access Policy based on Corporate device identifier

Hi all,

We have deployed an App Protection Policy (MAM) for our unmanaged mobile devices (Android/iOS). Our plan is to add users' IMEI numbers to Intune's Corporate Device Identifiers and integrate this with a Conditional Access policy, ensuring that users can only access Microsoft 365 apps on devices with a registered IMEI.

However, I haven’t found any documentation on how to create a Conditional Access policy based on IMEI. I’d appreciate any insights from those who have successfully implemented such a policy.

Thank you in advance!