Customers want to skip the delete Item folder, The user has been given new device and is deleting the messages from deleted items folder in target Exchange online mailbox, but Quest agent keep sync'ing them back.
対策
There is a way to skip the delete items folder using the QMM for exchange management shell.
WellKnownFoldersToSkip
Specifies the list of well-known folders that will be skipped along with their subfolders when performing a mail synchronization job.
Complete list of folders that can be specified in the list: Contacts, DeletedItems, Drafts, Journal, Notes, Outbox, JunkEmail.
Note that the following folders are always skipped: RecipientCache, SyncIssues, Conflicts, LocalFailures, ServerFailures, Files, YammerRoot, YammerInbound, YammerOutbound, YammerFeeds
beware though, that's a project setting, not just per collection or mailbox