This is still being worked upon. I hope to have more details in the next couple months.
Please know the team is actively working on this feature.
194 votes32 comments · Public » Apps, Connectors, Messaging Extensions · Flag idea as inappropriate… · Admin →Jasper de Jong commented
Is there any update from Microsoft on this topic. It's a big miss to not allow private Yammer groups/feeds into teams via the connector.
Should not be too big of a problem an lot of people asking for this feature...Jasper de Jong commented
Is anything done with this request? without the ability to use the private Yammer groups, it's basically a useless feature to connect to teams...