I have just enabled the Yammer connectivity in a D365 Model Driven App.
If I follow a Dynamics contact and open Yammer then I can create a Yammer message which is visible in the Yammer timeline both in D365 and also in native Yammer.
If I view the message in native yammer, it does have the Contact details which is a clickable link back to Dynamics. So far so good!
However, if I start in native Yammer, and create a new message which is not part of a pre-existing thread, is there any way of 'tagging' that message with a D365 contact in the same way as I could synch an Outlook email with that contact using the App for Outlook?