6/28/2019, 8:00 AM, UPDATE: Microsoft marked this issue as resolved last night at 10:20 PM.
6/27/2019, 3:00 PM: Some Microsoft cloud services are displaying the error "Our services aren't available right now." Many Office 365 customers, including Western, are seeing this error on some sites. What does appear to work for most people is to go straight to your Office 365 email using this address: https://outlook.office.com/mail
Once you are in your Outlook mail, you can use the Apps grid to open other Office 365 apps like OneDrive and Teams. The issue appears to be with sites that begin with "portal.office.com."