Update - We are continuing to monitor the impact of this issue as Microsoft works to mitigate it.
Nov 12, 2026 - 18:52 UTC
Nov 12, 2026 - 18:52 UTC
Investigating - We’re seeing delays delivering emails to Microsoft 365 (Outlook) recipients across all regions, due to an issue on Microsoft’s side affecting their mail infrastructure. Emails are delayed and being automatically retried, not lost. No action is needed from you. We’re monitoring and will post updates as we learn more.
Nov 12, 2026 - 18:51 UTC
Nov 12, 2026 - 18:51 UTC
Australia
Degraded Performance
AU: Server-Side: Mail Routing - Office 365
Degraded Performance
AU: Server-Side: Mail Routing - Exchange
Operational
AU: Server-Side: Signature Application
Operational
AU: Server-Side: Sent Items Update
Operational
AU: Client-Side: Signature Application - Office 365
Operational
AU: Data: User Synchronization
Operational
AU: UI: Admin User Interface
Operational
AU: UI: New Customer Onboarding
Operational
AU: Analytics: Click Tracking
Operational
AU: Feedback
Operational
Canada
Degraded Performance
CA: Server-Side: Mail Routing - Office 365
Degraded Performance
CA: Server-Side: Mail Routing - Exchange
Operational
CA: Server-Side: Signature Application
Operational
CA: Server-Side: Sent Items Update
Operational
CA: Client Side: Signature Application - Office 365
Operational
CA: Data: User Synchronization
Operational
UI: Admin User Interface
Operational
UI: New Customer Onboarding
Operational
CA: Analytics: Click Tracking
Operational
CA: Feedback
Operational
Europe
Degraded Performance
EU: Server-Side: Mail Routing - Office 365
Degraded Performance
EU: Server-Side: Mail routing - Google Workspace
Operational
EU: Server-Side: Mail Routing - Exchange
Operational
EU: Server-Side: Signature Application
Operational
EU: Server-Side: Sent Items Update
Operational
EU: Client Side: Signature Application - Office 365
Operational
EU: Client Side: Signature Application - Google Workspace
Operational
EU: Data: User Synchronization
Operational
EU: UI: Admin User Interface
Operational
EU: UI: New Customer Onboarding
Operational
EU: Analytics: Click Tracking
Operational
EU: Feedback
Operational
Germany
Degraded Performance
DE: Server-Side: Mail Routing - Office 365
Degraded Performance
DE: Server-Side: Mail Routing - Exchange
Operational
DE: Server-Side: Signature Application
Operational
DE: Server-Side: Sent Items Update
Operational
DE: Client Side: Signature Application - Office 365
Operational
DE: Data: User Synchronization
Operational
DE: UI: Admin User Interface
Operational
DE: UI: New Customer Onboarding
Operational
DE: Analytics: Click Tracking
Operational
DE: Feedback
Operational
DE: Server-Side: Mail Routing - Google Workspace
Operational
DE: Client Side: Signature Application - Google Workspace
Operational
UAE
Degraded Performance
UAE: Server-Side: Mail Routing - Office 365
Degraded Performance
UAE: Server-Side: Mail Routing - Exchange
Operational
UAE: Server-Side: Signature Application
Operational
UAE: Server-Side: Sent Items Update
Operational
UAE: Client Side: Signature Application - Office 365
Operational
UAE: Data: User Synchronization
Operational
UAE: UI: Admin User Interface
Operational
UAE: UI: New Customer Onboarding
Operational
UAE: Analytics: Click Tracking
Operational
UAE: Feedback
Operational
UK
Degraded Performance
UK: Server-Side: Mail Routing - Office 365
Degraded Performance
UK: Server-Side: Mail Routing - Exchange
Operational
UK: Server-Side: Signature Application
Operational
UK: Server-Side: Sent Items Update
Operational
UK: Client Side: Signature Application - Office 365
Operational
UK: Data: User Synchronization
Operational
UK: UI: Admin User Interface
Operational
UK: UI: New Customer Onboarding
Operational
UK: Analytics: Click Tracking
Operational
UK: Feedback
Operational
US
Degraded Performance
US: Server-Side: Mail Routing - Office 365
Degraded Performance
US: Server-Side: Mail Routing - Google Workspace
Operational
US: Server-Side: Mail Routing - Exchange
Operational
US: Server-Side: Signature Application
Operational
US: Server-Side: Sent Items Update
Operational
US: Client Side: Signature Application - Office 365
Operational
US: Client Side: Signature Application - Google Workspace
Operational
US: Data: User Synchronization
Operational
US: UI: Admin User Interface
Operational
US: UI: New Customer Onboarding
Operational
US: Analytics: Click Tracking
Operational
US: Feedback
Operational
UI: Authentication and Billing Portal
Operational
Client-Side: Outlook Add-In Deployment
Operational
Third-Party: Zoom Meeting Branding
Operational
Zoom Meetings
Operational
Zoom Marketplace
Operational
Zoom REST API
Operational
Zoom Web SDK
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.
Scheduled Maintenance
Planned platform resilience testing Nov 16, 2026 07:00-08:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:16 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:16 UTC
Planned platform resilience testing Nov 16, 2026 15:00-16:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:17 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:17 UTC
Planned platform resilience testing Nov 17, 2026 09:00-10:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:17 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:17 UTC
Planned platform resilience testing Nov 17, 2026 15:00-16:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:22 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:22 UTC
Planned platform resilience testing Nov 18, 2026 09:00-10:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:33 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:33 UTC
Planned platform resilience testing Nov 18, 2026 15:00-16:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:34 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:34 UTC
Planned platform resilience testing Nov 19, 2026 09:00-10:35 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:35 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:35 UTC
Planned platform resilience testing Nov 19, 2026 23:30 - Nov 20, 2026 01:05 UTC
Exclaimer engineers will be testing the resilience of the Exclaimer platform with planned high-volume failover testing.
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:35 UTC
There is no expected impact on any Exclaimer services during this maintenance testing window, as preparations have been made to mitigate any impact during this timeframe.
In the event of any unexpected incidents or service disruptions in the run-up to this maintenance action, the task will be rescheduled to a later date.
Posted on Nov 12, 2026 - 14:35 UTC