Is Microsoft 365 working?

What is happening

Microsoft is seeing broad recovery and stability across its services, but is still restoring service for some remaining customers and regions. Until this is complete, some users may still be unable to access their mailboxes in Outlook, across web, desktop and mobile, and email delivery may be delayed.

Parts of other Microsoft 365 services that rely on email in the background may also be affected. This includes Teams calendars, scheduling and meeting invitations, Planner, To Do, Copilot, viewing recently used files in the Microsoft 365 apps, sharing SharePoint files with people outside your organisation, and sending documents to print. In Teams, creating or deleting private and shared channels and adding new contacts may also fail.

What is unaffected

Teams calls, meetings, group chats and standard channel messages are working as normal. Files stored in SharePoint remain accessible. Parts of Microsoft 365 that do not depend on email continue to work.

What Microsoft is doing

Microsoft has explained that the issue was caused by a problem during an earlier upgrade to its network, which came to light after a more recent network change. Microsoft has confirmed this was a technical fault and not a cyber attack. The underlying cause has been fixed, and Microsoft is bringing services back gradually, checking stability at each stage. A full report will be published once Microsoft's review is complete.

What we recommend

• No action is needed on your devices or settings. The issue sits with Microsoft and not within your own systems.
• If an email appears not to have arrived, allow some extra time before resending, as delivery may still be delayed.
• For urgent matters, use the telephone or Teams chat in the meantime.
• If you rely on Teams or Outlook calendars, it may be worth confirming key meeting times with attendees directly.
• CREAVO clients needing assistance can contact our service desk on 0330 002 2466.

Microsoft's next update is expected by 8:00pm UK time.