@EnterpriseArchitect, Thanks for posting in Q&A. Currently, Intune only supports to enroll Ubuntu Desktop. Here is the system requirement for your reference:
To enroll Ubuntu Desktop into Intune, you can install Microsoft Intune app and sign in with your work or school account. When the device enrolled into it, it also registers into Azure AD.
For the requirement to do Azure AD join, it is not supported on Linux device. The only support OS are Windows 11 and Windows 10 devices except Home editions.
Hope the above information can help.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.