@Ricardo Goncalves, Thanks for posting in Q&A.
I have done some research about this issue, it may be because your device was enrolled to Intune first and then you added the device identifier, so the problem you described occurred.
You can try to add the corresponding identifier to Intune first and then enroll the device to Intune, and to check whether the issue can be fixed.
Hope above information can be helpful.
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