<a href="https://status.office365.com/" rel="nofollow">https://status.office365.com/</a> actually has a public status message now, since admins can't log in.<p><a href="https://portal.office.com/servicestatus" rel="nofollow">https://portal.office.com/servicestatus</a> is starting to get populated.
These types of outages are thankfully rare, but it always shocks me just how unexpectedly fragile our modern communication really is. Sure, there are other email services, but the impact this has is nonetheless surprising to me.