Can't access Outlook on the web and other Microsoft services and features

June 8, 2023 at 1:03 PM CDT
Final status: We’ve completed an extended monitoring period without observing any further interruptions to our Microsoft 365 services related to this event. We’ll continue working to finalize all outstanding mitigation efforts and will provide further updates within the forthcoming Post-Incident Report.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Start time: Monday, June 5, 2023 at 9:12 AM CDT

End time: Thursday, June 8, 2023 at 6:00 AM CDT

Current status: We’re working on implementing our various mitigation plans while we continue actively monitoring the service to ensure it remains in a healthy state. We also remain ready to address any impact to Microsoft 365 services.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Thursday, June 8, 2023 at 1:00 PM CDT

Current status: We’re continuing to treat this issue at the highest priority, we have several workstreams ongoing to apply further preemptive mitigation measures. We’re actively monitoring the environment and have validated that the service has remained stable as a result of several actions taken to address the impact to Microsoft 365 services.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Wednesday, June 7, 2023 at 10:00 PM CDT

Current status: We continue to observe stable service health since we've applied our various preemptive mitigations and we will closely monitor the service should there be a recurrence.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Wednesday, June 7, 2023, 1:00 PM CDT

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:

Exchange Online
- Users are unable to access Outlook on the web
- Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
- Users may also experience issues using the Outlook mobile application

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We continue investigating third-party claims of degrading our service health. Our engineering teams remain focused on maintaining service stability and applying preemptive mitigations to prevent further impact.

Furthermore, our efforts to implement changes regarding request usage volumes are ongoing. We are still observing that our infrastructure remains stable throughout implementing various mitigations. Lastly, we remain ready to intervene should we notice any reductions in service availability.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:

Exchange Online
- Users are unable to access Outlook on the web
- Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
- Users may also experience issues using the Outlook mobile application

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We’re continuing to monitor the service as we apply mitigations. We recently made a series of changes targeted at request handling logic, specifically around request usage volumes. Our telemetry indicates that the service has remained largely stable throughout this process; however, the incident is not fully resolved. We’re broadening our mitigation strategy and will continue to actively intervene should we detect further reductions in the availability of our services.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, 7:30 PM CDT

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
- Users are unable to access Outlook on the web
- Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
- Users may also experience issues using the Outlook mobile application

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We’ve deployed a change on load-balancing processes which has provided greater stability across the service, however, this has not fully resolved the issue. We're continuing to investigate and develop further workstreams to remediate overall impact. These include, but are not limited to:
- improvements in the request handling logic
- several changes targeted at request usage volumes

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, 2:30 PM CDT

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
- Users are unable to access Outlook on the web
- Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
- Users may also experience issues using the Outlook mobile application

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We’ve identified that the impact has started again, and we’re applying further mitigation. Telemetry indicates that we see a reduced impact from previous iterations due to previously implemented mitigations. Currently, workstreams include:
- deploying additional load-balancing processes
- several changes targeted at request usage volumes
- gathering dump files for analysis from impacted components

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, 12:30 PM CDT

June 6, 2023 5:08 AM CDT

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
- Users are unable to access Outlook on the web
- Users may also experience issues with the search function in Outlook on the web, Outlook desktop client and the Outlook mobile application
- Users may also experience issues using the Outlook mobile application

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: After applying mitigations, we're seeing availability return to healthy levels. We're continuing to monitor the environment while we investigate the underlying cause, increase monitoring, and develop further fixes to provide additional relief.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, 12:00 PM CDT

Can't access Outlook on the web and other Microsoft services and features
ID: MO572252

Status
Extended Recovery

Impacted services
Microsoft 365 suite

Details
Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:

Exchange Online

- Users are unable to access Outlook on the web

Microsoft Teams

- Users may have difficulties scheduling meetings and/or live events

- Users may have trouble loading people profile cards

- Users may have issues loading file lists

- Users may not be able to create new teams & channels

- Users may not be able to install apps

- Users may have trouble issuing searches

- Users may see delays in admin policy changes taking effect

- Users might see errors when using messaging extensions

- Users may not see up to date Presence information

- Teams Graph APIs may be impacted

- Assignments tab in Teams may not load

- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We've confirmed that service availability has returned to healthy levels. We'll continue to monitor service health while we analyze system logs to determine the cause of the problem.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Next update by: Tuesday, June 6, 2023, at 5:00 PM UTC

Current status: We've confirmed that service availability has returned to healthy levels. We'll continue to monitor service health while we analyze system logs to determine the cause of the problem.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Current status: We're seeing some service improvement and we remain focused to investigate and address the source of the issue.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
- Users are unable to access Outlook on the web

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Bookings, Microsoft Power Automate and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We're implementing some changes intended to improve the user experience and will closely monitor to ensure these changes deliver the desired effect. We're also narrowing down the potential source of the issue and remain focused on remediating impact as soon as possible.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.

We are continuing to investigate this issue.

We're currently analyzing error patterns to understand what factors are contributing to the issue. In parallel, we're investigating more immediate actions that can be taken to provide relief to users.

This quick update is designed to give the latest information on this issue.

Title: Can't access Outlook on the web and other Microsoft services and features

User impact: Users may be unable to access Outlook on the web or other Microsoft 365 services and features.

More info: Impacted services and features may include, but are not limited to:
Exchange Online
- Users are unable to access Outlook on the web

Microsoft Teams
- Users may have difficulties scheduling meetings and/or live events
- Users may have trouble loading people profile cards
- Users may have issues loading file lists
- Users may not be able to create new teams & channels
- Users may not be able to install apps
- Users may have trouble issuing searches
- Users may see delays in admin policy changes taking effect
- Users might see errors when using messaging extensions
- Users may not see up to date Presence information
- Teams Graph APIs may be impacted
- Assignments tab in Teams may not load
- Teams Admin Center functionalities may not perform as expected

SharePoint Online, OneDrive for Business, Microsoft Power Automate in Microsoft 365 and Power Apps in Microsoft 365 may also be experiencing some impact related to this issue.

Current status: We've determined that impact associated with MO571683 and EX571516 is reoccurring. We suspect that impact to our services is similar, though we're investigating to determine the scope of impact and the source of the issue.

Scope of impact: Users routed through the affected infrastructure are affected by this issue, however, impact can vary depending on where users are hosted.