Managing personal Outlook.com account settings, security, and privacy
Microsoft continues to respond here:
https://portal.office.com/servicestatus
So far, they have the fix replicated to 70% of the servers, with an estimated "fully restored" time of June 1, 2017, at 3:00 AM UTC.
I've went ahead and undid the about:config workaround, as it appears to be working for me right now.
Regards,
Jacob