When adding collaborators to a team project, a drop-down list appears with most recently invited people. As you type, suggestions are provided based on collaborators that you have invited before. Suggestions can also be provided of individuals or groups from your organizational address book if you are part of an Enterprise that has synced their Active Directory with the Adobe Admin console. The nature of these groups is static. The invitation is sent individually to every member of the group. If you want to add a collaborator to the group, add that person manually.
You can now invite groups along with individual collaborators. If you are part of an Enterprise that has synced groups from their Active Directory with the Adobe Admin console, then typing the name of a group in the Team Projects invitations entry field returns group suggestions.
You can get auto-complete of search results as you type individual or group names, suggestions of people, and groups.
For more information, see Collaborate with Team Projects.