Final Status: Engineers reverted a recent update to the environment which restored service.
User Experience: Affected users may have been unable to access their inbox and some message feeds in the Yammer service.
Customer Impact: Customer impact appeared to be limited during this event.
Incident Start Time: Thursday, March 5, 2015, at 2:15 PM UTC
Incident End Time: Thursday, March 5, 2015, at 3:10 PM UTC
Preliminary Root Cause: As part of our efforts to improve service performance, an update was deployed to the affected infrastructure; however, the update caused the inbox and message feed feature to become degraded.
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 procedures for validating service updates as this issue was not identified during the testing phase of the development process.
Please consider this service notification the final update on the event.