First time Mac user. Just purchased the machine and had to switch Outlook 2007 pst files into MacBook Pro's Office Mac 2011 Home & Business software. Once the server data was entered correctly, I was able to send and receive emails. However, I'm now getting the following error message (4 identical notes at a time) stating - 'An unknown error has occurred in Outlook. Error code - 17199'. These bundled messages appear every 10 minutes. Can anyone help solve this mystery, please?