YA34994| Service Restored |The affected users may have seen partial or blank message feeds. | 12/10/2015 5:30 PM UTC

Final Status: Engineers have confirmed that disabling a recent update successfully mitigated impact.

User Experience: The affected users may have seen partial or blank message feeds.

User Impact: Analysis of incident scope indicates that many customers may have had users experiencing impact related to this event. No customer reports of the issue have been identified at this time.

Incident Start Time: Thursday, December 10, 2015, at 4:54 PM UTC

Incident End Time: Thursday, December 10, 2015, at 5:30 PM UTC

Preliminary Root Cause: A recent update intended to enhance Yammer functionality may have resulted in service impact. The underlying cause of the issue remains 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: Further investigate the underlying cause of the issue and implement a solution to prevent future reoccurrences.

Please consider this service notification the final update on the event.

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