Interesting...
know its probably posted in a bunch of threads
But currently Outlook cannot connect to office 365 Online....
https://portal.office.com/admin/default.aspx#ServiceStatusPage7/15/2015 4:00:15 PM
Current Status: Engineers have determined that this issue may be related to a recent update to the service and are currently working to revert the update...
7/15/2015 2:32:34 PM (when we noticed the issue - outlook/devicesnot connecting to o365)
Current Status: The investigation determined that a new feature designed to improve the visual experience in email messages caused a memory consumption issue that impacted embedded attachments. Engine...
---------found this older post after posting mine---------