CRM Online and Yammer Automating Default Group Selection Based on Region

Hi,

We would like to turn on Yammer within our CRM Online instance.

However, there is on thing holding us back. The OOB Yammer configuration allows the selection of a default group for all Yammer posts to go to - unless the user chooses otherwise.

What we would like to do is automatically select an alternative default group based on the region of the user.

Does anyone know if there is a programmatic way that the default group can be selected?

We are using CRM Online 2016 Update 1

Thanks

Nic