User lists allow anyone in an organization to quickly add a specific group of people to a thread or forum. Anyone in your organization can create a user list, and anyone can view and join them.
If you’re a part of a user list, you can edit members, edit default forum, edit user list details or delete the user list.
To edit a user list:
Go to your organization in the left-side navigation
Go to the User Lists tab
Go to the user list you want to edit
Click … on that user list and choose what you’d like to edit