We are now marking this incident as resolved.

We will continue to monitor Microsoft's Service Health Status page in case the situation deteriorates or further action is required.

Thank you for your patience during today’s worldwide outage.

We are continuing to monitor Outlook and will review the incident status again at 17:00.

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Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We remain focused on addressing residual impact and ensuring reliable service restoration. We continue to assess recovery across various connection methods and are closely monitoring service health to verify sustained stability.

At this time, we have no evidence of malicious activity associated with this incident. We will continue to treat this with urgency until full mitigation, and we will share a full Post-Incident Report with root cause and defense-in-depth actions after mitigation is complete.

We’re pleased to report that the following services are now fully operational:

• Microsoft Teams
• Applicant CRM (Dynamics 365)
• TOPdesk (Operator Section)

We will continue to monitor Outlook until 17:00. At that point, we will assess whether the incident can be marked as fully resolved or whether Outlook should remain in a degraded state.

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Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We're observing sustained improvements in service availability as recovery progresses across affected Microsoft 365 services. While service functionality continues to improve, some users may still experience intermittent connectivity issues or delayed email delivery.

Our efforts are increasingly focused on resolving the remaining issues and restoring consistent service for all affected users. We're validating recovery across different connection methods and monitoring service stability to confirm that improvements are sustained.

We are changing the status of the Email and Calendar (Outlook) service from “Downtime” to “Degraded”, as access is beginning to return for many users.

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Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We're continuing to see improvements in service availability, with email queues significantly reduced and approaching normal levels. Some users may still experience intermittent access issues or delayed email delivery as recovery continues.

We've implemented additional mitigation measures and are restoring the remaining affected infrastructure while investigating residual service issues. We're closely monitoring service health and validating recovery across affected connection methods to ensure sustained service stability.

Access to Outlook (desktop and web) appears to be returning for some users. However, the incident is not yet resolved, and further disruption may occur.

We will continue to monitor the service closely until it has remained stable for an extended period.

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Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We're seeing continued recovery progress across affected regions, with broader improvements now observed in North America and sustained improvements across much of Europe. We're also seeing encouraging recovery signals in Asia Pacific, although some users may continue to experience intermittent access issues or delayed email delivery as mitigation progresses across the remaining affected infrastructure.

Our focus remains on stabilizing recovered infrastructure, completing mitigation in the remaining impacted areas, and reducing delayed email queues and backlogs. We're closely monitoring service consistency and validating recovery across different connection methods as we work toward full mitigation.

At this time, we have no evidence of malicious activity associated with this incident. We will continue to treat this with urgency until full mitigation, and we will share a full Post-Incident Report with root cause and defense-in-depth actions after mitigation is complete.

Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We’re seeing encouraging recovery progress in Europe, with service availability and email delivery performance improving across a growing portion of affected Microsoft 365 infrastructure.

We're focused on addressing the remaining areas of disruption and improving service consistency across affected regions. Reducing email queues and backlogs remains a priority, and the extended 48-hour email timeout window remains in place to help protect delayed messages as delivery catches up.

We will provide further updates as soon as possible and apologise for any inconvenience caused.

Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We've made additional progress toward service recovery, with recovery actions completed across portions of the affected infrastructure in the Asia Pacific region. Traffic is being gradually restored, and we're seeing improvements in key customer scenarios, including mailbox access and delayed email processing. However, some users may continue to experience intermittent issues.

Our focus is now on extending these recovery actions across affected infrastructure in other regions, while continuing stabilization efforts and adding supporting capacity to improve service consistency.

We will provide further updates as soon as possible and apologise for any inconvenience caused.

Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

Recovery actions are ongoing and have progressed in phases across affected Microsoft 365 infrastructure. Global telemetry and customer reports show incremental improvement in several workloads; however, service health remains variable and capacity has not yet fully returned to baseline.

Network and traffic-management actions remain active. To protect email during recovery, we’re continuing to prioritize queue and backlog processing, and the email timeout window has been extended to 48 hours to preserve delayed messages.

We will provide further updates as soon as possible and apologise for any inconvenience caused.

Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

Recovery efforts are ongoing across impacted infrastructure. We are
seeing early signs of stabilization, but service capacity has not yet returned
to normal levels and health remains variable as traffic is carefully
reintroduced.

We’re continuing to see increased server capacity stability after applying the upstream authentication/routing configuration component patch. With confirmation of server stability across the portions of infrastructure to which we've applied the patch, we’ve initiated its expansion systematically to focus on infrastructure supporting regions currently within or entering peak business hours. We’ll continue to monitor the status of changes applied and develop additional modifications intended to improve server stability and capacity.

As of now, we are not aware of any malicious activity that is causing this incident. We will continue to treat this incident with urgency and priority until full resolution. Once mitigated, we will provide full details of the root cause, defense-in-depth repair items, and more within a Post-Incident Report.

We will provide further updates as soon as possible and apologise for any inconvenience caused.

Early investigation into the impact on the University indicates that:

• Basic Teams functionality appears to be working.
• Outlook is experiencing downtime and is therefore inaccessible for all staff.
• Authentication appears to be unaffected by this outage.
• TOPdesk is affected, as it relies on Outlook for its email functionality.
• The Applicant CRM is also affected, as it also relies on Outlook.

Microsoft continue to work to resolve this incident. The most recent update from them is as follows:

We’re seeing positive results for server stability after applying an upstream authentication/routing configuration component patch to a portion of our infrastructure. We’ll continue to monitor its progress and are working to expand it to servers supporting active regions coming online.

We will provide further updates as soon as possible and apologise for any inconvenience caused.

Microsoft is experiencing a global outage affecting several Microsoft 365 services. This is also affecting services such as the Applicant CRM and TOPdesk (Operator Section).

Microsoft are aware of the issue and are working on it as a matter of urgency.

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What's affected

Email (Outlook)
- You may be unable to open your mailbox in Outlook, on the web or on your phone
- Emails may be delayed

Calendar and meetings
- Scheduling meetings, sending invites and editing or viewing calendar entries may fail
- Live and virtual events cannot be created
- Contacts may not sync or load in Teams

Teams
- Creating or deleting private and shared channels may not work
- Copilot features in Teams may not work

Copilot
- Copilot may not load or respond
- Copilot may not be able to access your email, calendar or files

Links in emails and documents
- Some links may fail to open

Recent files
- Your list of recently used files in Microsoft 365 apps may not appear

Planner and To Do
- Tasks and plans may be slow, unreliable or fail to load
- To Do may not open

Mobile apps (Power Apps / Field Service)
- Signing in on mobile may intermittently fail. Please use the web version instead, and avoid signing out if you're already signed in

TOPdesk (Operator Section)
- As TOPdesk relies on Outlook for its email functionality.

Applicant CRM
- As the Applicant CRM relies on Outlook for its email functionality.

We will provide further updates as soon as possible and apologise for any inconvenience caused.