Urgent: Request for Estimated Resolution Time – Microsoft Outlook Service Disruption

Question

Urgent: Request for Estimated Resolution Time – Microsoft Outlook Service Disruption

IT Operation 0

Dear Microsoft Support Team,

Regarding the Microsoft service disruption occurring today, we would like to request an update on the issue and an estimated time of resolution (ETR).

Our office is currently unable to access Microsoft Outlook, which is significantly disrupting our daily business operations and communication. This disruption has also resulted in operational losses, as our employees are unable to perform their work effectively due to the unavailability of the service.

We would appreciate it if you could provide:

The estimated time when the issue will be fully resolved.

The current status of the investigation and any ongoing remediation efforts.

Any available workaround that we can implement while waiting for the service to be restored.

Given the significant impact on our business operations, we kindly request your urgent attention and a prompt update.

Thank you for your assistance. We look forward to your response.

0 comments

3 answers

Your answer

Answer 1

Hello @IT Operation ,

First of all, I would like to clarify that this is a user-to-user community forum, where members help one another by sharing their knowledge and experiences. The Microsoft Support Team is not actively participating in this discussion.

Regarding your question about when Outlook will be fully restored, Microsoft has not yet provided a confirmed estimated time for resolution.

Also, Microsoft has not provided a confirmed workaround. If you are still unable to access your mailbox, I recommend contacting your organization's Microsoft 365 administrator to check whether any alternative email access methods are available within your organization.

Microsoft has identified infrastructure stability issues affecting traffic flow across multiple regions. As a result, users may experience connectivity failures, delayed email delivery, and intermittent issues accessing various Microsoft 365 features and services. Services and features that rely on Exchange Online are particularly impacted, while functionalities that do not depend on Exchange Online may remain operational.

According to the latest update for incident MO1550821, Microsoft is actively working to improve infrastructure stability and restore service availability. Although partial recovery has been observed in some regions, the issue has not yet been fully resolved, and Microsoft is continuing to investigate additional mitigation measures.

If you have Microsoft 365 administrator privileges, please sign in to the Microsoft 365 Admin Center to view the details of this issue.

If you're not an admin and don't know who the admin is in your organization, you can find guidance here: How can I find my Microsoft 365 admin? - Microsoft Support

Ask your admin to follow these steps:

Sign in to the Microsoft 365 Admin Center.
Go to Health > Service Health.
Search for Issue ID: MO1550821.
Select the issue and expand the details to review the latest updates, affected services, impact, and remediation information.

If admin center is currently not available, you can check the status of this issue at https://status.cloud.microsoft/ .

I'll continue to monitor this case and share further updates as soon as they become available.

Kind regards,

Answer 2

Deleted

This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Comments have been turned off. Learn more

Answer 3

No generally applicable estimated resolution time has been published for the November 13, 2026 Outlook/Exchange disruption; your Microsoft 365 administrator should open the tenant-specific incident under Health > Service health, where Microsoft posts the latest status, remediation progress, next-update time, and any estimate applicable to your organization.^1^

Current status

Microsoft has acknowledged an active Microsoft 365 service degradation affecting Outlook/Exchange-related services. Reported remediation has included isolating affected infrastructure, restarting components, rerouting traffic, and gradually returning servers to service. Recovery remains limited or sporadic, and there is currently no official general ETR.^1^

For information specific to your tenant:

Sign in to the Microsoft 365 admin center using an administrator account.
Go to Health > Service health.
Under Active issues Microsoft is working on, open the Outlook or Exchange Online incident.
Review:
- Status and User impact
- Last updated
- All updates, including investigation and mitigation details
- The stated time for Microsoft’s next update
- Any recovery estimate or workaround Microsoft has published

Service Support admins and Helpdesk admins can also view Service health. Administrators can select Manage notifications for this issue to receive incident updates at up to two email addresses.^2^

If the admin center itself is unavailable, use Microsoft’s public service-status page. The public page is a fallback; tenant Service health normally provides the more precise impact information.^3^

Temporary continuity options

There is no documented workaround that restores server-side Outlook or Exchange access during this incident. Available local continuity depends on data already cached on each computer:

Classic Outlook: Previously synchronized messages, calendar data, and contacts may remain accessible through Cached Exchange Mode. Users can draft messages, but Outlook cannot send or receive until it reconnects.
If Outlook shows Working Offline, that is different from Disconnected. To attempt reconnection, select Send/Receive > Work Offline once. If the button is no longer highlighted but Outlook remains disconnected, the server connection is still unavailable.
Do not repeatedly recreate Outlook profiles or reinstall Office while the tenant incident remains active; those actions do not remediate a Microsoft service incident.
If Outlook on the web remains reachable for your tenant, it can be used temporarily. If both desktop Outlook and web access fail, cached content is the only documented Outlook continuity option until service returns.^4^

Messages composed while offline remain queued and will send after connectivity is restored.

When to escalate

If the outage appears in your tenant’s Service health dashboard, Microsoft directs customers to track that incident there rather than open a duplicate support request. Service-health incident updates are generally posted hourly unless the incident notice specifies another cadence.^5^

If your organization is affected but no matching incident appears:

On Health > Service health, select Report an issue and submit the affected service and symptoms.
Alternatively, in the admin center select Help & support.
Enter the problem description.
If the suggested results do not resolve it, select Contact Support, choose phone or email, and submit the request.

Microsoft 365 business support requires an eligible subscription purchased through Microsoft; if all subscriptions were purchased through a partner, contact that partner instead.^6^

References