OUTLOOK MAIL

No reliable restoration time is publicly available; your Microsoft 365 administrator should check the tenant’s Exchange Online incident under Health > Service health for Microsoft’s latest update and any estimated recovery information.

Check the current incident update

1. Sign in to the Microsoft 365 admin center with an administrator account.
2. Select Health > Service health.
3. Under Active issues Microsoft is working on, open the Exchange Online or Outlook incident.
4. Review Status, User impact, Last updated, All updates, and the next scheduled update if one is provided. A scheduled update time is not necessarily the restoration time. ^1^
5. If the admin center is inaccessible, use Microsoft’s public service-status page. ^2^

If you are not an administrator, contact your organization’s Microsoft 365 administrator or IT service desk and ask them to provide the tenant-specific incident ID, current status, and next update.

When the same Exchange Online incident is already listed for your tenant, another support request is generally unnecessary because Microsoft is already working on it. Access should recover as service is restored, although delayed message delivery may persist during recovery. Microsoft advises monitoring Service health for progress when Exchange Online is degraded. ^3^

Patient-safety continuity

Do not depend on email for time-critical patient communication during the outage. Activate your organization’s approved clinical downtime and escalation procedures now—for example, its designated emergency communication channel—and notify the clinical safety lead or incident commander. Do not move protected patient information to unapproved personal email, messaging, or storage services.

Escalate if your impact differs

If Service health shows no matching incident, or your organization’s impact is more extensive than the advisory describes:

1. In the Microsoft 365 admin center, select Help & support.
2. Describe the affected users, inability to send/receive or access mailboxes, start time, and patient-safety/business impact.
3. If suggested results do not help, select Contact Support and choose phone or email.

This process requires a Microsoft 365 business administrator. If the subscription was purchased through a partner, contact that partner for support. ^4^

References

1. How to check Microsoft 365 service health
2. Microsoft service health status
3. Find and fix email delivery issues as a Microsoft 365 for business admin
4. Get support for Microsoft 365 for business