Shared mailbox permission or group type: picking the right one

This sheet compares Correct pick, Wrong pick to avoid.

CriterionCorrect pickWrong pick to avoid
Mail must appear to come directly from the shared mailbox, no on-behalf-of wordingSend As permissionFull Access (opens the mailbox but can't send as it) or Send on Behalf (shows on-behalf-of wording)

The verdict, the full comparison, 4 rules and 4 traps are part of AB-650 access. Unlock AB-650.