Microsoft is Experiencing Issues

User impact: Users may be unable to connect to multiple Microsoft 365 services.

Update from Microsoft:

We've begun returning a portion of the affected servers to service, and they're remaining stable so far. We’ve also shifted traffic and connections to alternative pathways wherever possible and have observed limited recovery in some regions.

Next NDUS CTS Update: 7:30am CST

For more information, please see Microsoft Service Health Status: https://status.cloud.microsoft/

User impact: Users may be unable to connect to multiple Microsoft 365 services.

Update from Microsoft:

We're continuing to work through restarting and validating the affected servers to safely return them to service, and we're exploring opportunities to expedite this process. In parallel, we're assessing whether reverting the small number of recent configuration updates we identified could help accelerate recovery.

Next NDUS CTS Update: 5:30pm CST

For more information, please see Microsoft Service Health Status: https://status.cloud.microsoft/

Update from Microsoft:

We've validated an alternative health check method on a subset of affected infrastructure, which allowed the servers in that subset to successfully return to service, and we're now applying this change more broadly. We're also preparing an automated recovery process to continually detect and restart unresponsive servers, to help keep them in service while this change progresses. Additionally, our review of recent changes has identified a small number of configuration updates that we're investigating as potential contributors to the issue.

Next NDUS CTS Update: 4:30pm CST

For more information, please see Microsoft Service Health Status: https://status.cloud.microsoft/

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:

• Exchange Online
• Microsoft Teams
• SharePoint Online
• Microsoft Copilot 365
• Microsoft Defender XDR

Current status: We're aggressively pursuing all pathways to reduce impact. As a precaution, we've paused all deployments and configuration changes while we review recent changes for any correlation to this event. We've determined that the elevated load isn't driven by an overall increase in traffic, but by a large number of servers being unexpectedly unavailable, which is shifting load onto the remaining infrastructure. We're investigating what's causing these servers to become unavailable while we work to safely return them to service.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next NDUS CTS update: 3:30pm CST

Update from Microsoft:

User impact: Users may be unable to connect to multiple Microsoft 365 services.

More info: Potentially impacted services include:

• Exchange Online
• Microsoft Teams
• SharePoint Online
• Microsoft Copilot 365
• Microsoft Defender XDR

Current status: We're aggressively pursuing all pathways to reduce impact. As a precaution, we've paused all deployments and configuration changes while we review recent changes for any correlation to this event. We've also moved traffic for some services off the affected infrastructure to further reduce load, with additional traffic moves in progress.

Scope of impact: This issue may affect users attempting to access the affected Microsoft 365 services.

Next NDUS CTS Update: 2:30 CST

User Impact: Users may have trouble accessing Microsoft services

Current Status: Update from Microsoft: While we're working to mitigate impact, we've confirmed the issue may affect Microsoft 365 service connectivity for users in any region

Next Update: 1:30pm CST