Restrict wildcard mentions

This feature is only available to organization owners and administrators.

Organization administrators can configure who is allowed to use wildcard mentions that affect a large number of users. In particular, an organization can restrict who is allowed to use @all (and, equivalently, @everyone and @stream) in streams with more than 15 subscribers, and @topic in topics with more than 15 participants.

  1. Go to Organization permissions.

  2. Under Stream permissions, configure Who can notify a large number of users with a wildcard mention.

  3. Click Save changes.