Using Google Groups for Business
Use Groups as mailing lists or forums, to collaborate with co-workers, and more! 
Overview How To FAQ  

In a Q&A forum, members of your user community can help each other solve problems and answer questions.
To enjoy all features of Groups, your organization must enable Google Groups for Business.
More resources

Groups Help Center
See more topics about using Google Groups.

Support your users
Get email templates and other materials to transition your users to the new Groups.

Apps administration
Get help managing Google Groups for your organization.