Is YOUR Outlook down? Thousands can't send emails Monday morning

Outlook is down across the US and other countries, leaving people unable to use Outlook as they return to work Monday morning.

DownDetector, a site that monitors online outages, shows problems hit around 10:15 am ET and mainly impacts Microsoft's emailing service.

Users are seeing black screens and an error message that reads: Service Unavailable. HTTP Error 503. The service is unavailable.'

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