I have switched over to Office 2013 recently. There is an automatic feature to send and receive emails at a specified interval in all versions of Outlook. There is check box for switching this feature on or off too.

After I upgraded, the check box gets unticked automatically after a short while and you get no warning for this. One notices this when mails do not get sent and keep lying in out box or one does not get emails for a long time.

Because of this, a manual send and receive is being done which is very cumbersome. Checking the box does not help as it is not reliable. What could be the problem??? I have tried Office 365 too and it has the same issue!!