Final Status: Engineers identified an issue in which Yammer Single Sign-On (SSO) users may have experienced intermittent sign-in failures. The investigation determined a newly installed temporary license was showing as expired. The license was re-uploaded to the server, which remediated impact.
User Experience: Affected users may have been intermittently unable to sign in to Yammer.
Customer Impact: Analysis indicates that customers would likely have had few, if any, users who experienced impact related to this event. No customer reports of the issue were identified during the incident.
Incident Start Time: Wednesday, August 12, 2015, at 12:00 AM UTC
Incident End Time: Wednesday, August 12, 2015, at 1:38 AM UTC
Preliminary Root Cause: A newly installed temporary license was showing as expired. 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: Identify the underlying root cause and develop a solution to prevent reoccurrences.
Please consider this service notification the final update on the event.