Platform Performance Issues: Some customers are experiencing platform slowness
Monitoring - The platform performance issue identified earlier today has been resolved.

We're continuing to investigate separate reports of the application becoming unresponsive for a subset of users, and are working directly with affected customers to gather diagnostic information.

We'll share further updates as we progress.
Sep 14, 2026 - 18:12 BST
Update - We are continuing to investigate reports of platform performance affecting some customers.

We will provide further updates as we learn more.
Sep 14, 2026 - 15:31 BST
Update - We are investigating reports of platform performance affecting some customers.

Our Engineering team have identified a brief anomaly earlier today and are continuing to investigate. A hard refresh/restart of the app clears the issue temporarily.

We will provide further updates as we learn more.
Sep 14, 2026 - 13:52 BST
Update - We are continuing to investigate this issue.
Sep 14, 2026 - 12:16 BST
Investigating - Platform performance issues have been identified and are affecting some Sedna customers across clusters. Affected users may experience intermittent slowness when using the platform. The issue is under investigation by our Engineering team as an emergency.
Sep 14, 2026 - 11:00 BST
Uptime over the past 90 days. View historical uptime.
SEDNA - www.sednanetwork.com Operational
SEDNA - Private Hosting Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Sep 14, 2026

Unresolved incident: Platform Performance Issues: Some customers are experiencing platform slowness.

Sep 13, 2026

No incidents reported.

Sep 12, 2026

No incidents reported.

Sep 11, 2026

No incidents reported.

Sep 10, 2026

No incidents reported.

Sep 9, 2026

No incidents reported.

Sep 8, 2026

No incidents reported.

Sep 7, 2026

No incidents reported.

Sep 6, 2026

No incidents reported.

Sep 5, 2026

No incidents reported.

Sep 4, 2026

Mail Egress Outage: Some Customers will be unable to Send Mail
Resolved - This incident has been resolved. Mail delivery to Microsoft 365 and Outlook recipients has returned to normal.

We saw no further reports of delayed or failed delivery following confirmation from affected customers and our monitoring.
Sep 4, 21:09 BST
Update - We are continuing to see a recovery in our services for customers sending to Microsoft and MS 365 supported recipients, and we'll continue to monitor.

We'll provide more updates as soon as they become available
Sep 4, 19:02 BST
Update - We are continuing to see a recovery in our services for customers sending to Microsoft and MS 365 supported recipients, and we'll continue to monitor.

We'll provide more updates as soon as they become available
Sep 4, 16:39 BST
Monitoring - We are seeing signs of recovery in mail delivery to Microsoft 365 and Outlook recipients, and are continuing to monitor closely to confirm the issue is fully resolved.

Microsoft has acknowledged the issue on their end, and updates from Microsoft can be tracked at: https://x.com/MSFT365Status.

We will post a further update once we've confirmed full recovery.
Sep 4, 15:58 BST
Update - We are continuing to investigate an issue affecting outbound email from Sedna to recipients hosted on Microsoft 365 and Outlook.

What's happening: Microsoft's anti-spam filtering is rejecting messages sent from a number of our outbound IP addresses. Senders are receiving bounce-back notifications (NDRs) for affected messages.

We will post updates as the investigation progresses.
Sep 4, 14:44 BST
Identified - We are investigating an issue affecting outbound email from Sedna to recipients hosted on Microsoft 365 and Outlook. Microsoft's anti-spam filtering is rejecting messages sent from a number of our outbound IP addresses, and senders are receiving bounce-back notifications (NDRs) for affected messages.

Inbound mail is not affected, and delivery to recipients outside of Microsoft 365 / Outlook is unaffected.
Sep 4, 11:50 BST
Investigating - An outage affecting Sedna’s mail egress services has been identified. Affected users are unable to send mail. The issue is under investigation by engineering as an emergency.
Sep 4, 10:36 BST
Microsoft service disruption affecting Microsoft Graph email egress
Resolved - Resolved – Microsoft has confirmed full recovery from the service degradation affecting Graph-based mail flow (EX1464935). All Sedna services related to Microsoft Graph email egress are now operating normally. We've seen no further reports of impact since our last update. Thank you for your patience while we monitored this alongside Microsoft.
Sep 4, 09:45 BST
Monitoring - Microsoft has reported that core mail flow and search functionality are recovering, with service availability above 99%.

The majority of users should no longer be experiencing impact. We are continuing to monitor to confirm persistent stability before closing this incident. Microsoft's next update is expected by September 2, 2026, at 4:30 PM UTC. We will update this page accordingly.
Sep 2, 10:29 BST
Update - We are continuing to investigate this issue.
Sep 2, 10:28 BST
Update - We have received reports that services have returned to normal. Microsoft’s service degradation, EX1464935, remains listed as active as of September 2, 2026, at 01:32:37 UTC. We will continue to monitor the situation closely and provide a further update once Microsoft confirms full resolution or if conditions change.
Sep 2, 03:30 BST
Update - Some users are reporting improved mail flow this morning. Microsoft's service degradation (EX1464935) remains listed as active as of 06:39 UTC, and we continue to monitor closely. We will post a further update once Microsoft confirms full resolution or if conditions change.
Sep 1, 08:46 BST
Update - The Microsoft service degradation is still ongoing. Microsoft has not yet provided an estimated time for resolution. We continue to monitor the situation and will provide further updates as they become available.
Sep 1, 02:28 BST
Update - We are continuing to investigate this issue.
Aug 31, 20:49 BST
Investigating - Microsoft has reported service degradation that may affect outbound emails sent from Sedna via Microsoft Graph. Customers may experience delays or failures when sending emails. We are monitoring the situation and will provide updates as they become available.
Aug 31, 20:49 BST

Sep 3, 2026

No incidents reported.

Sep 2, 2026

Sep 1, 2026

Aug 31, 2026

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