Cause of Parliamentary downtime on Microsoft Office 364½ revealed

Last updated on September 8th, 2018

A major Microsoft Office 365 outage in the Houses of Parliament that left up to 3,000 users without email was due to Microsoft failing to inform itself about a technical change, The Register can reveal.  The outage occurred on 23 June and resulted in a total of 13 hours of downtime, the Parliamentary Digital Service said in response to a Freedom of Information request.