There could be a few reasons that Outlook could fail to connect. Before you contact the Help Desk, please review the following:
Did you just change your password? If yes, it may be that you need to re-enter the password for Outlook. If this doesn't fix the problem, check the next item on this list.
Are any co-workers having the same issue? If yes, then the issue is likely widespread. Contact the Help Desk immediately by calling 7-5715. (Or 503 947-5715 if you are out of the office.)