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For device clean-up in Endpoint Manager Intune, please see the following:
Using Intune device cleanup rules  - Microsoft Tech CommunityRetire or wipe devices using Microsoft Intune | Microsoft Docs
heruy ejigu, Thanks for the question! Take a look at this doc on managing stale objects in Azure AD: How to manage stale devices in Azure AD | Microsoft Docs. There really isn't a database you can manage in AAD. Additionally, if you use PowerShell, you can manage objects using the Remove-ADComputer CMD-LET Remove-ADComputer (ActiveDirectory) | Microsoft Docs
- thank you Roy ! I. will check it out.
heruy ejigu Sounds like you're in a HAADJ scenario. Take a look at the section for Hybrid Azure AD Join device cleanup via the link shared by Roy Barton. It provides the steps to cleanup and in which order.
