Update 1:56 PM:
This issue appears to have been resolved by Microsoft. Please continue to report any additional problems to the Service Desk at x4-1950 or email@example.com.
There is currently an issue reported that outbound mail traffic is not being delivered. This appears to be an issue with Microsoft Online services and their engineers are currently working to assess and remedy. IT@Sam will post new information as it is received. This does not impact e-mail being sent from one SHSU e-mail address to another or inbound e-mail traffic.