YA35122 | Service Restored | Affected users may have experienced delays in real-time message posting.| 12/15/2015 10:20 AM UTC

Final Status: The investigation determined that a recent update to the environment caused a portion of the Yammer infrastructure that facilitates message flow to become degraded. Engineers rolled back the update to the previous healthy version to restore service.

User Impact: Affected users may have been experiencing delays in real-time message posting. The messages may have been being posted but would not appear until a hard-refresh of the page or a new feed load.

Customer Impact: Analysis of incident scope indicates that a very limited number of customers and users appear to be impacted. No customer reports of the issue were identified during this event.

Incident Start Time: Tuesday, December 15, 2015, at 4:56 AM UTC

Incident End Time: Tuesday, December 15, 2015, at 11:50 AM UTC

Preliminary Root Cause: A recent update to the environment caused a portion of the Yammer infrastructure that facilitates message flow to become degraded. The underlying root cause is 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: Review the infrastructure update process to prevent reoccurrences of this scenario.

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

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