Own or manage a Chatter group? Here’s how you add or remove group members.
|Available in: both Salesforce Classic and Lightning Experience|
|Available in: Group, Enterprise, Professional, Performance, Unlimited, Contact Manager, and Developer Editions|
In Salesforce Classic, on a group detail page, click Add/Remove Members. In Lightning Experience, click Add Member from the group highlights panel (your administrator must add this quick action to the group publisher).
Start typing the name of the user you want to add or remove to filter the list of users.
Click Add to add a member, or to remove a member. For people who have requested to join, click Accept to accept the request, or to decline.
Click Done when you're finished.