Quarantine Folder for Office 365 - what privilege?
I've set a dedicated email address to manage the quarantine for both Exchange Online and OneDrive applications. This mailbox has a Microsoft 365 Business Basic (OneDrive is included) subscriptions and once I've tried to use it in the OneDrive config:
CAS return the above indication like the mailboxes is not usable. The other emails (Business Standard licensed) are instead accepted.
May be a privilege problem?