Microsoft 365 priority accounts are a way to mark accounts for special processing. Microsoft is building features to exploit priority accounts, but they can be used for other purposes, like checking if an account has account to a resource. Of course, multiple other methods exist to do the same job, but that’s not reason to exclude priority accounts from the mix.
https://office365itpros.com/2021/01/15/use-microsoft-365-priority-accounts-access-checks/
