Hi ipodtrip,
To troubleshoot this issue, I would like to confirm some information below:
1. Does the Outlook Web App work fine?
2. Can you connect to Outlook 2013 (Windows OS) without issues?
3. Do other Mac users encounter this issue?
4. Please set up your account on a workable Mac to see if the issue persists.
5. Please also create a new profile to see if there is any improvement.
Best regards,
Ran