UPDATE: Microsoft Office 365 and Azure services now seem to be fully restored. Microsoft has contacted Computing with the following, rather glib, comment attributed to "a Microsoft spokesperson". ...
25,000 'events' Office 365 recorded and shared among 30 engineering teams at Microsoft
The tools for handling the mountain of email we receive every day simply aren't good enough
Nineteen critical bug fixes in Microsoft Patch Tuesday - including a remote code execution flaw affecting HoloLens
Patch Tuesday isn't going away just yet, although Adobe may be kicking its patch habit
Too few volunteers even to patch major security flaws following LibreOffice "fork"
Remember Word macro viruses? This is even worse