If the connection is restored, Microsoft Office Outlook 2007 automatically switches back to Connected or Connected (Headers).
To set the root folder path for your IMAP account:1.
For example, when you use a fast connection, Office Outlook 2007 copies the header, body, and attachments of an email item from the email server to your computer.
When a slower connection is selected, only headers are automatically downloaded.
If you work offline, whether by choice or due to a connection problem, your data is still available to you instantly wherever you are.
If a connection from your computer to the server running Exchange isn't available, Microsoft Office Outlook 2007 switches to Trying to connect or Disconnected.
Use Cached Exchange Mode to work with items in your Office 365 or Microsoft Exchange Server mailbox even when your network connection is slow or unavailable.