@AnthonyLiwen-4936, Thanks for posting in Q&A.
From your description, I know you want to disjoin the computer from its AAD and rejoin to Intune as standard user, if there is any misunderstanding, please let me know.
If you want to disjoin device from Azure AD, you can run the command "dsregcmd.exe /debug /leave". Since you want to perform this in multiple devices you can create a script with above command and push the file to all devices and run it through GPO.
After disjoining from Azure AD, you can enroll in Intune using Autopilot enrollment or Bulk enrollment method, both of them can set the user as standard user and there is no need to remove from AD.
Here are links you can refer.
https://learn.microsoft.com/en-us/mem/intune/enrollment/windows-bulk-enroll
https://learn.microsoft.com/en-us/autopilot/windows-autopilot-hybrid
Hope above information can be helpful.
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