@Anonymous Thanks for posting in our Q&A. From your description, did you mean that you want to use Company Portal app to enroll a windows device to intune? If there is anything misunderstanding, please correct me.
Please refer to the following article to try:
https://learn.microsoft.com/en-us/mem/intune/user-help/enroll-windows-10-device
With this method, the device's ownership will show "Personal" and join type will show "Azure AD registered".
Hope it will help.
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