Office 365 Groups - Yammer or Outlook and how to select which one my group has

At the Microsoft Ignite 2016 conference, it was announced that Yammer would be coming to Office 365 Groups

This is big news and a real driver for social collaboration and chat.

Yammer or Outlook, not both
However, Office Groups, for the foreseeable future, will not have both Outlook and Yammer for tracking conversation within the group.

How can I choose which one I have in my group?
This is thankfully really simple:

• If your group was initially created in Yammer, then it will come with a Yammer group, but not Outlook persistent conversation (it will still come with a distribution list)
• If you create  your group anywhere else in 365, including in the admin portal, then your group will be give an Outlook persistent conversation experience and no Yammer group

Can I swap between them?
No, is the simple answer. Microsoft Product Management are aware of the need to be able to swap between the two services, or even have both, but  this is currently not available and only in their back-log.

If you do have a genuine need to change from Yammer to Outlook or vice-versa, then you will need to create a new group and migrate all content.

I'll write up a post in the future about when to use either Yammer or Outlook and outline some of the benefits of each approach.