Deleted Device in INTUNE - how can I get it back in INTUNE?

My advice? Cleanup the old intune lingering registry keys and tasks on the device and use the deviceenroller.exe to let it enroll back in to intune . You could use a powershell tool to do so

https://call4cloud.nl/2022/10/intune-sync-debug-tool-the-last-royal-treasure/

or do it manually like i am mentioning here the the scriptfix.ps1
https://call4cloud.nl/2023/05/fixmissingintunecertificate-withmde/

Both of them works great and would get your device back to intune

In addition:
- it's a Surface Device, still member of Entra AD and on-premise AD, everything works fine, we just "lost" it in INTUNE
- we do not use Autopilot, only INTUNE
Is there any logging we can find who and when it was deleted from INTUNE?
THX for your reply 🙂
Best regards,
Sven