Zero Networks incident
Zero Networks - Emergency Maintenance in Progress
Zero Networks experienced a minor incident on September 4, 2026 affecting MFA and Email Notifications, lasting 6h 40m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Sep 04, 2026, 10:00 AM UTC
We’re reaching out to notify you that emergency maintenance is currently in progress. Our team has identified an issue requiring immediate action, and we are working urgently to resolve it. During this time, you may experience issues with Microsoft Email notifications. Rest assured, this is our top priority, and our engineers are actively working to restore full service as quickly as possible. Real-time updates are available on our status page: https://status.zeronetworks.com We sincerely apologize for the unexpected disruption and appreciate your patience as we work to resolve the issue. We will send another update as soon as the maintenance is complete and systems are fully operational. Thank you for your being a Zero Networks’ customer.
- identified Sep 04, 2026, 11:51 AM UTC
We’re reaching out to notify you that emergency maintenance is currently in progress. Our team has identified an issue requiring immediate action, and we are working urgently to resolve it. During this time, you may experience issues with Microsoft Email notifications. This is due to an ongoing issue with twilio. You can stay updated on twilio’s status here: https://status.twilio.com/incidents/v0xwp70fbfrf We sincerely apologize for the unexpected disruption and appreciate your patience as we work to resolve the issue. We will send another update as soon as the maintenance is complete and systems are fully operational. Thank you for your being a Zero Networks’ customer.
- monitoring Sep 04, 2026, 12:53 PM UTC
A fix has been implemented and we are monitoring the results.
- monitoring Sep 04, 2026, 02:57 PM UTC
We're providing an additional update on the ongoing email delivery issue. The problem seems to have been resolved, but we still don't have confirmation from the email provider. What's affected: Email-based one-time passcode (OTP) delivery for MFA, as well as email notifications. Customers using email OTP may experience delayed or undelivered codes. Other MFA methods and authentication paths are unaffected. Cause: The disruption originates upstream of our platform. Our email delivery provider (SendGrid/Twilio) relies on Microsoft 365 for delivery to Microsoft-hosted recipient domains, and Microsoft has confirmed an active Exchange Online service degradation (Microsoft issue ID EX1467029) causing delays for messages sent to and from external domains. Microsoft has not yet published a resolution timeline. Current status: Our mitigation remains in place and we continue to monitor delivery. Messages are being queued and retried rather than dropped, so delayed codes may still arrive. Recovery is dependent on Microsoft restoring full service. Real-time status links: Zero Networks: https://status.zeronetworks.com Twilio/SendGrid: https://status.twilio.com/incidents/v0xwp70fbfrf Microsoft 365 (issue EX1467029, visible in your M365 admin center Service Health dashboard): https://status.cloud.microsoft Real time third party status: https://groups.io/email-provider-status?isp=Microsoft+365 Recommended action: If email OTP codes are delayed, please use an alternate MFA method or SSO in order to authenticate. Avoid repeatedly requesting new codes, as this adds to the delivery queue. We'll post another update as conditions change or once Microsoft confirms mitigation. Thank you for your patience.
- resolved Sep 04, 2026, 04:40 PM UTC
This incident has been resolved.