Consider the following scenario:
- You enable the MAPI over HTTP transport protocol in an environment that has Microsoft Exchange Server Cumulative Update 5 installed.
- You have two users (user A and user B) in the environment. Both of their mailboxes have on-premises archive enabled.
- You grant the Full Access permissions on user B to user A.
- You log on to the mailbox of user A through Microsoft Outlook 2013 Service Pack 1.