We are still experiencing intermittent issues with Outlook Web App (OWA) and Outlook for Mac client connectivity.

Server Support are troubleshooting the problem with Microsoft. Several things have been tried without success at this point. Server Support have monitoring in place to restart services as needed or remove malfunctioning servers from rotation. They are considering possible next steps, including moving to a new version of Exchange on-prem.

Please continue to create Incident tickets and link to the Problem master ticket for each event as appropriate. Also continue to notify Server Support of new incident reports.

What to tell customers: 
Our server admins are continuing to work on this issue, and have engaged with Microsoft for assistance. If you experiencing an interruption, please wait a few minutes and then try again.

Addendum:

As new issues occur, we are making new master tickets each time. Each master ticket is linked to the following Problem ticket for tracking progress on troubleshooting this issue with Microsoft:

https://oregonstate.teamdynamix.com/TDNext/Apps/425/Tickets/TicketDet?TicketID=3462590