Additionally, the messages in the primary mailbox's Drafts folder are not synchronized to the Outlook for Mac client, and they are visible only when you use Outlook Web Access or a Windows Outlook client. Instead, the messages are saved in the Drafts folder of the primary mailbox on the Exchange Server.
In this scenario, email messages that you send from the shared mailbox are not saved in the Sent Items folder of the shared mailbox. You send email messages from the shared mailbox. You use the credentials of the primary mailbox to access the shared mailbox. In the same Outlook profile or identity, you open a secondary shared mailbox that is hosted on Exchange Server 2013, Exchange Server 2010, or Exchange Server 2007. You configure Microsoft Outlook 2016 for Mac or Outlook for Mac 2011 to open a primary mailbox that is hosted on Microsoft Exchange Server 2013, Exchange Server 2010, or Exchange Server 2007. You have a primary mailbox that has Full Access and Send As permissions to a shared mailbox. Applies to: Exchange Server 2013 Enterprise, Exchange Server 2013 Standard Edition, Exchange Server 2010 Enterprise, Exchange Server 2010 Standard, Exchange Server 2007, Outlook 2016 for Mac, Outlook for Mac for Office 365.Email messages that you send from a shared mailbox aren't saved in the Sent Items folder in Outlook for Mac
