INKY incident
Office365 Exchange Issue - Some users may be unable to send, or see delays up to two hours when sending email messages
INKY experienced a notice incident on March 14, 2024 affecting Office 365, lasting 1d. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- monitoring Mar 14, 2024, 05:16 PM UTC
Relaying information from Microsoft about an issue they are currently experiencing with Exchange Online EX736432 - O365 Admins should be able to see all updates and details in O365 Service Health Dashboard Title: Some users may be unable to send, or see delays up to two hours when sending email messages through Exchange Online User impact: Users may be unable to send, or see delays up to two hours when sending, email messages through Exchange Online. More info: These failures and delays could occur when sending email through any Exchange Online connection method. Users may receive a Non-Delivery Report (NDR) when a message fails to send.
- monitoring Mar 15, 2024, 12:09 PM UTC
EX736432 - O365 Admins should be able to see all updates and details in O365 Service Health Dashboard Title: Some users may be unable to send, or see delays up to two hours when sending email messages through Exchange Online User impact: Users may be unable to send, or see delays up to two hours when sending, email messages through Exchange Online. More info: These failures and delays could occur when sending email through any Exchange Online connection method. Users may receive a Non-Delivery Report (NDR) when a message fails to send. Current status: We're continuing to analyze some sample message IDs, as well as requesting extended message traces for those sample message IDs, to determine if additional mitigation actions are required to fully resolve the issue. Scope of impact: Some users who are serviced through the affected infrastructure and are sending email messages through any Exchange Online connection methods may be impacted. Start time: Sunday, March 10, 2024 at 2:00 PM CDT Root cause: A recent change intended to resolve another ongoing issue was enabled and introduced unbalanced network traffic to the affected infrastructure, leading to impact. Next update by: Friday, March 15, 2024 at 12:00 PM CDT
- resolved Mar 15, 2024, 05:18 PM UTC
Microsoft has closed the issue saying it has been resolved. Mar 15, 2024, 12:01 PM CDT Title: Some users may be unable to send, or see delays up to two hours when sending email messages through Exchange Online User impact: Users may have been unable to send, or see delays up to two hours when sending, email messages through Exchange Online. Final Status: We’ve received confirmation from impacted users that email messages are delivering as expected. The aforementioned persisting impact as reported by a small number of users isn’t related to this event. Scope of impact: Some users who were serviced through the affected infrastructure and were sending email messages through any Exchange Online connection methods may have been impacted. Start time: Sunday, March 10, 2024 at 2:00 PM CDT End time: Thursday, March 14, 2024 at 1:41 PM CDT . Root cause: A recent change intended to resolve another ongoing issue was enabled and introduced unbalanced network traffic to the affected infrastructure, leading to impact. Next steps: - We're assessing how impact related to the change wasn't identified prior to deployment so that we can improve our change management processes. This is the final update for the event.