Office 365 is down and not working for thousands of users tonight.

Reports of the major outage began at around 9.30pm GMT with Microsoft fans revealing that they can’t log in or use the hugely popular software.

Down Detector has also registered a surge of Office 365 down reports with problems across the globe.

Down Detector is an independent website which tracks social mentions around certain topics to detect outages across the globe.

Problems have been seen in areas including the UK, Europe, US and Australia.

Microsoft has acknowledged the issue saying ” We’ve received reports of an issue affecting access to Microsoft 365 services.

“We’ve identified a degraded portion of infrastructure that manages authentication requests and have restarted that infrastructure to mitigate impact.”

Office 365 users have now taken to Twitter to report issues with the service.

One user tweeted: “@Office365 Why is Office 365 down again? Why is the status up and office 365 is clearly down? Portal login give error – can’t even login.”