
Hi @sns ,
When we delete the user from Microsoft 365 admin center or Azure AD, their related UserInfo information is not removed.
To completely remove people from SharePoint, we could use the way mentioned by trevor.
Or run the following command in SharePoint Online Management Shell:
Remove-SPOUser -Site https://fabrikam.sharepoint.com -LoginName ******@fabrikam.com
When we update the user property in Azure AD, it will be reflected in SharePoint online UPA.
The profile properties that are synced by the UPA sync process are not configurable. Synchronization times will vary based on workloads.
More information for your reference:
https://learn.microsoft.com/en-us/sharepoint/remove-users#remove-people-from-the-userinfo-list
https://learn.microsoft.com/en-us/sharepoint/user-profile-sync
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