Problem: Users don't see RSS and Atom feed options for their groups in the Google Groups for Business service.
Possible cause: The RSS and Atom feed options are available only for public groups (groups whose messages can be viewed by anyone).
Solution: First, you must set the Public on the Internet sharing option for the Google Groups for Business service. Learn more about setting sharing options
Next, the owner of the group must make the group's messages accessible to the public, as follows:
- From the Google Groups Home screen, click My groups.
- Click the name of the group you want to make accessible.
- Click Manage then on the left click Permissions > Access permissions.
- In View topics, select Anyone.