Current Status: The investigation determined that a networking issue is causing the service to be unavailable. Currently, engineers are moving database infrastructure away from the affected network environment.
User Experience: Affected users may be unable to connect to Yammer.
Customer Impact: Customer impact appears to be limited at this time.
Incident Start Time: Wednesday, May 27, 2015, at 12:14 PM UTC
Preliminary Root Cause: A portion of the networking infrastructure became degraded.