Update - Mitigated - Microsoft API connectivity has continued to improve, and Nylas API error rates and request throughput have returned to near-normal levels across the US and EU regions.
However, we are still processing a significant backlog of Microsoft email and calendar notifications accumulated during the disruption. Customers may continue to experience delays in email and calendar synchronization and associated webhook delivery while this backlog is cleared.
Our team is actively monitoring recovery progress and will provide further updates as the situation evolves.
Microsoft Status Page: https://status.cloud.microsoft/
Nov 13, 2026 - 05:51 PST
However, we are still processing a significant backlog of Microsoft email and calendar notifications accumulated during the disruption. Customers may continue to experience delays in email and calendar synchronization and associated webhook delivery while this backlog is cleared.
Our team is actively monitoring recovery progress and will provide further updates as the situation evolves.
Microsoft Status Page: https://status.cloud.microsoft/
Nov 13, 2026 - 05:51 PST
Monitoring - We are seeing significant recovery in Microsoft's services, with Nylas API request success rates and throughput for Microsoft integrations returning to normal operating levels.
While Microsoft has not yet officially resolved its incident, our monitoring indicates that the impact on Nylas services has substantially subsided. We are continuing to monitor email and calendar synchronization, webhook delivery, and any remaining processing backlogs across the US and EU regions before considering this incident fully resolved.
Microsoft Status Page: https://status.cloud.microsoft/
Nov 13, 2026 - 04:24 PST
While Microsoft has not yet officially resolved its incident, our monitoring indicates that the impact on Nylas services has substantially subsided. We are continuing to monitor email and calendar synchronization, webhook delivery, and any remaining processing backlogs across the US and EU regions before considering this incident fully resolved.
Microsoft Status Page: https://status.cloud.microsoft/
Nov 13, 2026 - 04:24 PST
Identified - Microsoft has acknowledged that they have an incident regarding their systems that Nylas uses to communicate for Microsoft grants.
At this time, Webhooks and Nylas API calls regarding Microsoft grants may not succeed or have significant delays. All other providers, including on-premise Exchange, are not affected.
Webhooks regarding Microsoft grants that are not triggering will fire correctly once communication to the Microsoft services has been restored.
We are continuing to track this incident to ensure our services will resume normal operation as soon as Microsoft has resolved their issues.
Microsoft status page: https://status.cloud.microsoft/
Nov 12, 2026 - 10:59 PST
At this time, Webhooks and Nylas API calls regarding Microsoft grants may not succeed or have significant delays. All other providers, including on-premise Exchange, are not affected.
Webhooks regarding Microsoft grants that are not triggering will fire correctly once communication to the Microsoft services has been restored.
We are continuing to track this incident to ensure our services will resume normal operation as soon as Microsoft has resolved their issues.
Microsoft status page: https://status.cloud.microsoft/
Nov 12, 2026 - 10:59 PST
Investigating - We are investigating a widespread issue affecting Microsoft grants in the US and EU regions. This appears to be caused by an issue on Microsoft's side, as requests to Microsoft Graph are failing or responding slowly, and we are receiving significantly fewer change notifications from Microsoft than usual.
Some customers may experience errors when sending messages, errors or slower responses on email, calendar, and contacts API requests, and webhook notifications for new or updated data arriving later than expected or not at all. Email, calendar, and contacts data may also take longer than usual to sync.
Google, IMAP, and other providers are not affected. We are monitoring the situation closely and will provide additional information as it becomes available.
More details here about the Microsoft outage:
https://status.cloud.microsoft/
Nov 12, 2026 - 10:29 PST
Some customers may experience errors when sending messages, errors or slower responses on email, calendar, and contacts API requests, and webhook notifications for new or updated data arriving later than expected or not at all. Email, calendar, and contacts data may also take longer than usual to sync.
Google, IMAP, and other providers are not affected. We are monitoring the situation closely and will provide additional information as it becomes available.
More details here about the Microsoft outage:
https://status.cloud.microsoft/
Nov 12, 2026 - 10:29 PST
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