I have Outlook 2013 on Windows 8.1. It is linked with an external IMAP account. Outlook will not sync and receive message into the Inbox unless I have selected a different folder or selected Calendar, Tasks or another item from the bottom toolbar. Even if I have Mail selected and select "Send/Receive" messages will not come through. I have checked the settings for automatically receiving messages and setting it on different times does not make a difference. I have tried checking filters, those have been remove and nothing. I have tried checking settings in my external email (through Bluegenesis) and there is nothing there that makes a difference. It is very frustrating to have to either close out and reopen my Outlook to get new messages or have something other than Inbox selected. I have tried to check all settings, rules, etc. and do not have anything special set. I already tried removing the account completely and setting it up again, but I'm still having the same issue.