Your mailbox is located on a server if you use Outlook with Microsoft Exchange Server. In a mailbox that is located on the server.
Microsoft Outlook automatically stores messages, contacts, appointments, tasks, notes, and journal entries in one of the following two locations: For more information, see Limits to using personal folders files over LAN and WAN links. pst file to a network share is not supported. See the 'References' section for links to other articles and suggestions for solutions.