An administrator adds them in Setup by entering Users in the Quick Find box, then selecting Users.
Can only see:
Groups they belong to.
People in groups they belong to. Customers only see limited profiles including photo, name, title, email, common group memberships, common files, and activity statistics and influence. They can't post to profiles.
Files shared to groups they belong to.
Records or other Salesforce information, even in search results.
Topics, including topics in the feed, the topics list, topic detail pages, Recently Talked About, and Trending Topics. (Customers can see hashtag (#) topics.)
Recommendations and can't be recommended to others. Additionally, groups that allow customers can't be recommended.
Are identified as a customer in profiles and groups they belong to. Customers and groups with customers are easily identified by the orange upper left corner of their photo.
Have limited profiles, including name, photo, title, company, email, feed, group membership, file ownership, and activity statistics and influence.
Can't be followed. Additionally, customers can't follow people or files.
Can be group members and managers. If the customer is a manager, they will be able to see users who request to join the group, even if they aren't in other common groups, and approve requests.
Can't own, create, delete, moderate, join, or ask to join groups.
Can invite people that they're in common groups with to join groups that they manage.
Can't invite people inside your company's domain whose profiles they can't see.
When you invite someone as a customer to your group, they are given a unique username and password to log in to this group within your organization, even if they’re already a member of another Salesforce organization. They will not be able to use other Salesforce logins to access your customer group.
If a customer has an issue logging in to the group, verify that they are using the username and password from the welcome email they received after registering for the group. If the problem persists, ask your administrator for help.
If a customer loses their password, they can use the Forgot Password option to reset it. If they don’t have their username, they should contact the administrator of the organization in which they’re a customer to recover it.
Considerations for Mobile Users
Chatter customers are able to log in and use the Salesforce1 apps and the Chatter Mobile for BlackBerry app. The same restrictions are applied to customer users as when using Chatter on the Web.