It's not intermittent for me. I can't log in at all, despite repeated attempts.

I'm having that experience as well to be honest but I thought I would respect the wording on their status page for the submission title.

There is a parallel thread which mentions Skype as being affected too.

https://news.ycombinator.com/item?id=13924838

I guess this across all of Microsoft's offerings.

I would not be surprised if it was. The specific problem I'm having is that the domain login.live.com is failing to load. Given that this domain handles logins for all of Microsoft's services, it's not surprising to me that a failure here would cause failures across a number of other services.

The service status page has been updated with a comment that they're deploying a fix:

Current status: We're deploying a fix to restore service. Users should begin to experience service restoration as the fix is rolled out.

The fix worked for the login issues but there are additional issues with the OneDrive service:

Current status: We've determined that the previously resolved issue had some residual impact to the service configuration for OneDrive. We're performing an analysis of the affected systems to determine what further steps are needed for full recovery.

XBox live as well. I'm guessing it's all across Microsoft

As for me, I can't log in to my Skype account at all