Please help me understand this strange (to me) behavior
Goal
Allow delegated users to send-on-behalf-of other mailbox using OWA and iOS/Android apps.
Sent items should appear only once in the delegated mailbox (no sent item should be duplicated anywhere).
Configuration
Delegate has Full Access
+ Send On Behalf Of
permissions to delegated mailbox
OWA Scenario 1
Messages sent on behalf of this mailbox will appear in the Sent Items folder of the: Sender mailbox
Delegates can send email from delegated mailbox - sent items appear only once in the delegated mailbox.
This is great from a desired behavior standpoint, but the Sender mailbox setting should cause the sent item to appear in the delegate's mailbox right?
OWA scenario 2,3
Messages sent on behalf of this mailbox will appear in the Sent Items folder of the: From mailbox
or
Messages sent on behalf of this mailbox will appear in the Sent Items folder of the: Sender and From mailbox
Delegates can send email from delegated mailbox - sent items appear twice in the delegated mailbox and not at all in the delegate's mailbox. Why??