Not able to login Outlook, Copilot

No firm public restoration ETA is currently available; monitor Microsoft’s status feed for your account type because recovery estimates and progress are posted there as mitigation proceeds.

If this is a personal Microsoft account

The latest public consumer-status snapshot lists Outlook.com and Microsoft Copilot as operational, although its timestamp may lag current conditions.^1^

Check the Microsoft Service Health Status page periodically:

https://status.cloud.microsoft

Because Outlook and Copilot both stopped accepting sign-ins at approximately the same time, avoid resetting New Outlook, removing the account, or reinstalling applications while an incident may still be active. Those actions do not resolve a service-side outage.

If this is a work or school account

Ask your Microsoft 365 administrator to open:

1. Microsoft 365 admin center
2. Health → Service health
3. Review Active issues Microsoft is working on
4. Open the relevant Outlook/Exchange Online or Microsoft Copilot incident to see:
   • Current status
   • User impact
   • Latest update
   • Mitigation progress
   • Any estimated recovery time

Microsoft posts investigation, mitigation, and restoration updates in that incident record. Administrators with the Service Support admin or Helpdesk admin role can also view service health.^2^

If the admin center itself cannot be reached, use the public status page above. The service-health status helps interpret progress:

• Investigating: Microsoft is still determining cause and scope.
• Restoring service: corrective action is being deployed.
• Extended recovery: restoration is underway but will take time to reach every affected system.
• Service restored: Microsoft has confirmed recovery.^2^

After Microsoft reports restoration

Restart New Outlook and Copilot, then try signing in again. If both public status and tenant Service Health show healthy but the problem continues, use the Windows Get Help app to report the account sign-in failure, including:

• Whether the account is personal or work/school
• The exact error message
• Approximate failure start time and time zone
• Whether browser sign-in also fails
• A screenshot with personal information hidden

References

1. status.cloud.microsoft
2. How to check Microsoft 365 service health