Is outlook down

Yes—Microsoft is currently reporting an Outlook/Exchange Online service incident affecting mailbox connections, including Outlook on the web, so the “failed to fetch” error is consistent with a Microsoft-side outage.

Monitor the public Microsoft service health status page for recovery updates ^1^. No local repair should be necessary while the incident remains active; retry Outlook after Microsoft marks the service as restored. Microsoft’s Outlook.com guidance also directs users with access problems to that status page ^2^.

If service health shows everything is restored

Only then test Outlook.com in an InPrivate or Incognito window:

• Works privately: clear cookies and site data for Outlook/Microsoft sites, then temporarily disable browser extensions such as ad blockers.
• Still fails on multiple browsers or devices: contact Outlook.com support. If Outlook opens, select Help, enter the problem, then choose Still need help? → Yes. If Outlook cannot open at all, use Microsoft’s direct sign-in support option documented on the support page ^3^.

References

1. Microsoft service health status
2. Fixes or workarounds for recent issues on Outlook.com | Microsoft Support
3. Can't send or receive email in Outlook.com | Microsoft Support