Final Status: Engineers added additional capacity and subsequently re-routed traffic to alternate Yammer infrastructure to mitigate impact. The message queue has cleared and there are no longer delays when sending and receiving Yammer messages.
User Experience: Affected users may have experienced delays when sending and receiving Yammer messages.
Customer Impact: Impact was limited throughout the duration of the incident. The most prominent forms of impacted messages included: message posting and replies, digests, activation and sign-up, group joins and mentions.
Incident Start Time: Wednesday, May 27, 2015, at 2:30 PM UTC
Incident End Time: Wednesday, May 27, 2015, at 8:00 PM UTC
Preliminary Root Cause: The message delivery process that the Yammer infrastructure utilizes was not functioning as expected. 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 occurrences.
Please consider this service notification the final update on the event.