Final Status: Engineers have determined that abnormally high activity was likely responsible for this issue and monitored system load to validate mitigation. Additionally, engineers re-enabled a subset of the components that facilitate the functionality of a specific version of Windows Notifier.
User Experience: Affected users may have been unable to use Windows Notifier version 18.104.22.1687.
Customer Impact: Customer impact appeared to be limited during this event. As a workaround, engineers recommended upgrading Windows Notifier to the latest version, 22.214.171.1249, which is available for download here: https://about.yammer.com/product/desktop-application/
Incident Start Time: Thursday, June 18, 2015, at 3:20 PM UTC
Incident End Time: Thursday, June 18, 2015, at 9:27 PM UTC
Preliminary Root Cause: High resource utilization on a portion of capacity that facilitates network traffic may have caused impact to the affected build. The underlying root cause is still under investigation.
Next Steps: The following is a list of known action item(s) associated with this incident. As part of the Office 365 problem management process, additional engineering actions may be identified to improve the overall service.
– Action: Investigate resource utilization patterns and automated recovery options to prevent reoccurrence of the issue.
Please consider this service notification the final update on the event.