Final Status: Engineers temporarily disabled a Yammer component to mitigate impact.
User Experience: Affected users may have been unable to access Yammer.com.
Customer Impact: Customer impact appeared to be limited during this event. Engineers have identified that users connecting from the North America region were impacted by this event.
Incident Start Time: Thursday, May 28, 2015, at 10:06 PM UTC
Incident End Time: Thursday, May 28, 2015, at 10:30 PM UTC
Preliminary Root Cause: During our efforts to add additional capacity, Yammer.com experienced performance issues.
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: Review the infrastructure update process as adding additional capacity caused impact to occur during a deployment.
Please consider this service notification the final update on the event.