September 1, 2026 10:52PM UTC
MONITORING
Update 9/1/2026 @ 6:50pm EDT
Microsoft Update:
We’re continuing to advance multiple workstreams to restore service and prevent additional impact. We’re prioritizing infrastructure that requires the most immediate attention while carefully expanding corrective actions across additional regions, with continued monitoring throughout this process. In parallel, we’re investigating remaining reports of impact and evaluating additional actions to support full-service recovery.
Thank you,
SilverSky SupportSeptember 1, 2026 1:01PM UTC
MONITORING
Update 9/1/2026 @ 9:00am EDT
Here is the latest update from Microsoft. They say the next update will not be available until 4:00pm. Just a reminder you can follow this incident through your Microsoft Admin Portal. Issue ID: EX1464935.
"A substantial portion of the remediation deployment has been completed, and organizations whose environments remain affected are expected to recover as the deployment reaches the relevant infrastructure. As remediation progresses, we're focused on validating sustained recovery and monitoring for any remaining pockets of impact before determining whether any additional corrective actions are required.
This quick update is designed to give the latest information on this issue.
We recognize the impact this issue may be causing for your organization and want to assure you that resolving it remains our highest priority. We appreciate your patience and understanding as we continue working toward mitigation."
Thank you,
SilverSky SupportSeptember 1, 2026 11:11AM UTC
MONITORING
Update 9/1/2026 7:15 AM
Update from Microsoft:
We're continuing to apply the targeted authentication component fix across the remaining affected infrastructure where necessary. Service telemetry continues to indicate recovery, with availability increasing across previously impacted scenarios as remediation progresses. We're validating that authentication, connectivity and search operations are returning to expected service levels while monitoring for any residual impact and confirming that the remediation is delivering broad mitigation across affected Exchange Online scenarios. As recovery signals continue to trend positively, we're maintaining extended monitoring across affected service workflows to ensure improvements are sustained.
Thank you,
SilverSky SupportAugust 31, 2026 10:50PM UTC
MONITORING
Update 8/31/2026 @ 6:50pm EDT
Update from Microsoft:
We're continuing our targeted review of affected infrastructure and recent changes made to the service to definitively confirm the cause of impact. We're additionally continuing to test and implement various mitigation strategies to apply the necessary authentication component, which have so far yielded positive results. We're monitoring these tests and mitigative actions closely and will provide an estimated time to resolution as soon as one is available. We understand the impact that events like these can have for your organization and we appreciate your patience as we work to mitigate this issue with the highest priority.
Thank you,
SilverSky Support
August 31, 2026 7:02PM UTC
MONITORING
Update 8/31/2026 3:00pm EDT
Here is the latest update from Microsoft:
Users may be unable to connect to, or experience degraded functionality with Exchange Online
Issue ID: EX1464935
Affected services: Exchange Online
Status: Service degradation
Issue type: Incident
Start time: Aug 31, 2026, 11:08 AM EDT
More info
We've confirmed that the authentication component issue impacts other services beyond Exchange Online. For more information regarding other impact scenarios, please see: MO1465074.
We've opted to keep this post (EX1464935) open as Exchange Online remains the most predominantly impacted service.
Users may experience a variety of symptoms related to this event, including but not limited to:
- Delays, failures, or incomplete results when searching for content within Exchange Online mailboxes.
- Delays or failures when sending or receiving email messages.
- Authentication-related errors when accessing Exchange Online services.
- Difficulties accessing or performing actions within Exchange administration experiences.
- Intermittent failures affecting mailbox operations and message delivery workflows.
Scope of impact
This issue may impact users attempting to send or receive email messages through Exchange Online. We're continuing our investigation to determine the full scope of affected scenarios and will provide additional information as it becomes available.
Preliminary root cause
An issue within a core authentication configuration used by multiple Microsoft 365 services is resulting in impact.
Current status
Aug 31, 2026, 2:41 PM EDT
We're continuing to fine-tune our remediation strategy as our internal tests progress. We'll aim to provide an estimated time for remediation as soon as it's available.
Next update by:
Monday, August 31, 2026 at 4:00 PM EDT
Thank you,
SilverSky Support
August 31, 2026 5:47PM UTC
MONITORING
Update 8/31/2026 1:45pm EDT
Please be aware of the following issue going on with the Microsoft Exchange Online service. You can access their support portal from your admin portal for updates.
Users may be unable to connect to, or experience degraded functionality with Exchange Online
Issue ID: EX1464935
Affected services: Exchange Online
Status: Service degradation
Issue type: Incident
Start time: Aug 31, 2026, 11:53 AM EDT
More info
More info: Users may experience a variety of symptoms related to this event, including but not limited to:
Delays or failures when sending or receiving email messages.
Authentication-related errors when accessing Exchange Online services.
Difficulties accessing or performing actions within Exchange administration experiences.
Intermittent failures affecting mailbox operations and message delivery workflows.
Scope of impact
This issue may impact users attempting to send or receive email messages through Exchange Online. We're continuing our investigation to determine the full scope of affected scenarios and will provide additional information as it becomes available.
Current status
Aug 31, 2026, 12:33 PM EDT
We’ve isolated a common failure pattern across affected Exchange Online requests that is associated with authentication and protocol connectivity. We're analyzing service telemetry to identify the underlying source of impact and validate potential remediation options. Additionally, we’re continuing to assess the scope of impact and monitor for additional affected scenarios.
This quick update is designed to give the latest information on this issue.
Next update by: Monday, August 31, 2026, at 5:30 PM UTC
Thank you,
SilverSky Support