What is going on with Outlook!!!!!!!!!!!

A current Microsoft 365 service incident is affecting Outlook/Exchange Online access across web, desktop, and mobile, so your Microsoft 365 administrator should monitor the incident in Service health rather than reinstalling or reconfiguring Outlook on individual devices.^1^

Immediate administrator actions

1. Sign in to the Microsoft 365 admin center with an administrator account.
2. Go to Health → Service health.
3. Under Active issues Microsoft is working on, open the Outlook or Exchange Online incident.
4. Record its incident ID, current status, affected services, user impact, and latest update.
5. Use Manage notifications for this issue to send updates to alternate email addresses that remain reachable.

Service health provides tenant-specific incident information and Microsoft’s investigation, mitigation, and restoration updates. Service interruption means users cannot access the service; Restoring service or Extended recovery means Microsoft is applying the correction, but recovery may not reach every mailbox simultaneously.^2^

Because every user and every connection method is affected, local profile repair, cache clearing, reinstalling Outlook, or switching between new and classic Outlook is not an appropriate organization-wide fix while this incident remains active.

If the admin center will not load

Use Microsoft’s public service-status page to follow known issues that prevent access to the tenant or admin center.^2^

Communicate internally through a non-Microsoft-365 channel, such as your phone system, SMS, or another operational platform. Tell users not to repeatedly reset passwords or remove accounts while the service incident is ongoing.

If your tenant does not show the incident

In Health → Service health, select Report an issue and submit:

• Organization-wide impact
• Failure on web, Windows, and mobile
• Inability to sign in, send, receive, search, or use calendars
• Approximate start time and time zone
• Number or percentage of affected users
• Confirmation that both new and classic Outlook are affected

Reported issues are compared with reports from other organizations and can be promoted to an incident or advisory when Microsoft identifies a service-originated problem.^2^

Also open an urgent business support request:

1. In the admin center, select Help & support at the bottom right.
2. Describe the issue as organization-wide Exchange Online outage across web, desktop, and mobile.
3. If the suggested results do not resolve it, select Contact Support.
4. Choose phone or email and provide an alternate reachable contact.

This requires an administrator account and a subscription purchased through Microsoft. If all subscriptions were purchased through a Microsoft partner, contact that partner for support instead.^3^

Once Microsoft marks the incident Service restored, test one representative mailbox in Outlook on the web first, then desktop and mobile. If only particular users remain affected after restoration, run the Outlook User Connectivity diagnostic with an administrator account; client-specific repair should begin only at that point.^4^

References

1. Microsoft service health status
2. How to check Microsoft 365 service health
3. Get support for Microsoft 365 for business
4. Fix Outlook connection problems for Microsoft 365 account