Final Status: Engineers have validated that all cached data relating to the configuration change has been refreshed and that impact has been mitigated.
User Impact: The affected users were unable to see the Yammer icon within the app launcher or after clicking “View all my apps” within portal.office.com. As a workaround, affected users could access their yammer site directly by utilizing the following format: yammer.com/(tenant name).
Customer Impact: Analysis of incident scope indicates that many customers appear to be impacted by this event. For those customers affected, this issue potentially affects any user attempting to view the Yammer icon in the app launcher or my apps section of portal.office.com. Some customers reported that their organization was affected by this issue.
Incident Start Time: Tuesday, November 17, 2015, at 12:45 AM UTC
Incident End Time: Wednesday, November 18, 2015, at 12:06 AM UTC
Preliminary Root Cause: As part of our efforts to improve recognition of which customers utilize the Yammer service, an update was deployed to the directory services component; however, the update exposed a configuration issue within the service.
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 procedures for validating service updates, as a configuration issue was not identified during the testing phase of the development process.
Please consider this service notification the final update on the event.