I have a CEO who has upwards of 100,000+ emails (80,000 unread). He recently hired an administrative assistant to help with his calendar. He now sees the value in having someone help with his inbox management.
However, he only wants her to see emails from outside our domain. No emails from internal users should be seen by his AA. We are on Exchange 2013.
I am fairly certain this isn't possible. But I thought I would ask to see anyone has encountered this issue.