Final Status: After re-distributed the service load and disabling non-critical server tasks, engineers performed tests and determined that service availability had fully recovered.
User Experience: Affected users were unable to access the Yammer service.
User Impact: Analysis of incident scope indicates that many customers appear to have been impacted by this event. For those customers affected, this issue potentially affected any user attempting to access Yammer. No customer reports of the issue have been identified at this time.
Incident Start Time: Friday, December 4, 2015, at 7:27 PM UTC
Incident End Time: Friday, December 4, 2015, at 8:07 PM UTC
Preliminary Root Cause: A portion of the Yammer infrastructure that facilitates core Yammer functionality is experiencing higher-than-expected resource utilization. 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 ensure the problem doesn’t reoccur.
Please consider this service notification the final update on the event.