Possible Yammer maintenance to take place on May 23

There is a possibility that additional work relating to migration activities of Yammer.com customer-facing services to Microsoft datacenters may be required. Otherwise, this maintenance will not take place. Yammer.com will be unavailable for the duration of the maintenance window. Yammer’s mobile clients will also be unusable during this time.

More information: Possible Yammer maintenance to take place on May 23