As a moderator, you can deactivate Chatter Free users if, for example, they left the company.
Required Editions
| Available in: both Salesforce Classic and Lightning Experience |
| Available in: Essentials, Group, Enterprise, Professional, Performance, Unlimited, Contact Manager, and Developer Editions |
| User Permissions Needed | |
|---|---|
| To deactivate Chatter Free users: | Moderate Chatter |
When the owner of a Chatter group is deactivated, the deactivated user still owns the group. But a user with the Modify All Data permission can assign a new owner for a public or private group. For unlisted groups, a user with the Manage Unlisted Groups permission can assign a new owner.
- To go to the person's profile page, click their name in the People tab or on a feed.
-
On the profile page, click Deactivate
User from the user action menu.

If you want to reactivate a Chatter Free user, use global search to find their profile. You use global search because deactivated users don't appear on the People tab.