Update - Microsoft is testing a configuration change to address an overwhelmed process on affected servers. It has also begun reverting a recent network configuration change and is monitoring the results. Microsoft has not yet confirmed that service has recovered.
Shield’s access to Microsoft 365 mailboxes and email delivery to Microsoft 365 through both Shield and CloudFilter remain affected. We’re continuing to monitor the impact and will share updates as more information becomes available.
Nov 12, 2026 - 20:18 EST
Shield’s access to Microsoft 365 mailboxes and email delivery to Microsoft 365 through both Shield and CloudFilter remain affected. We’re continuing to monitor the impact and will share updates as more information becomes available.
Nov 12, 2026 - 20:18 EST
Update - Microsoft continues to restart and validate affected servers as it works to restore service. Shield’s access to Microsoft 365 mailboxes and email delivery to Microsoft 365 through both Shield and CloudFilter remain affected.
Our changes to isolate Microsoft-bound traffic have improved mail flow to other providers. We’re continuing to monitor the situation and will share updates as more information becomes available.
Nov 12, 2026 - 16:58 EST
Our changes to isolate Microsoft-bound traffic have improved mail flow to other providers. We’re continuing to monitor the situation and will share updates as more information becomes available.
Nov 12, 2026 - 16:58 EST
Update - We’ve made changes to isolate traffic destined for Microsoft 365 and reduce delays for mail going to other providers. Delivery to Microsoft 365 remains affected. We’re continuing to monitor mail flow.
Nov 12, 2026 - 15:09 EST
Nov 12, 2026 - 15:09 EST
Update - Microsoft has begun redistributing connection traffic and restarting affected servers to reduce the impact of its ongoing service disruption. Some connectivity issues and email delivery delays may continue while Microsoft works to restore service.
We’re continuing to monitor the impact on Shield and CloudFilter and will share updates as we learn more.
Nov 12, 2026 - 14:42 EST
We’re continuing to monitor the impact on Shield and CloudFilter and will share updates as we learn more.
Nov 12, 2026 - 14:42 EST
Identified - Microsoft is investigating an Exchange Online issue affecting mailbox access in the Americas. Microsoft is tracking the issue as EX1550543.
We’re seeing Microsoft Graph API errors that are affecting Shield’s ability to access Microsoft 365 mailboxes. We’re also seeing Microsoft’s servers temporarily defer messages from Shield and CloudFilter, resulting in email delivery delays for affected Microsoft 365 customers.
This issue originates with Microsoft and is not caused by Shield or CloudFilter. Our team is monitoring the impact and investigating options to mitigate delivery delays. We’ll share updates as we learn more.
Nov 12, 2026 - 13:35 EST
We’re seeing Microsoft Graph API errors that are affecting Shield’s ability to access Microsoft 365 mailboxes. We’re also seeing Microsoft’s servers temporarily defer messages from Shield and CloudFilter, resulting in email delivery delays for affected Microsoft 365 customers.
This issue originates with Microsoft and is not caused by Shield or CloudFilter. Our team is monitoring the impact and investigating options to mitigate delivery delays. We’ll share updates as we learn more.
Nov 12, 2026 - 13:35 EST
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Our goal is 100% uptime.
We recognize the importance of being able to trust the companies which help run your business. We want to be one of the most transparent vendors you work with. Transparency keeps us honest, and drives us to our goal of 100% uptime.
We monitor the status of all Mailprotector services. If there are any interruptions in service, a note will be posted here.
If you are experiencing problems with your Mailprotector service and do not see a notice posted, please contact our service team.
Shield
Degraded Performance
Bracket Encrypted Email
Operational
Radar
Operational
CloudFilter and SafeSend Email Security
Degraded Performance
Management Console
Operational
XtraMail Continuity
Operational
SecureStore Archiving
Operational
CloudMail Hosted Email
Operational
Service Announcements
Operational
Issue Notice
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.