Enabling external groups
Group owners can make private and secret (also known as private unlisted) groups accessible to outside contributors if this feature is enabled in your community.
In an externally accessible group, group members (both external contributors and standard community users) can invite external contributors to these groups.
When disabled after being enabled for a period, all content created by external contributors continues to exist, and external contributors continue to be visible in the community, but they are no longer able to log in.
By default, externally accessible groups are enabled.
To give users permission to create an externally accessible group:
The users with the permissions assigned can see the option to Enable external access under the Advanced options when creating or editing a group in the user interface. For step-by-step instructions on creating a group with external access, see Creating externally accessible groups in the Cloud User Help.