When you enter a contact into the Booking Manager address book you may want to add that contact to a certain user group for easier filtering of the contacts or to give that contact certain access right for work on the CBM.
To add the contact to the user group first go to Work > Addressbook. If you set your filter to NO GROUP (1.) to find contacts that are not assigned to any user group. Select the contact (2.) and click on tab Access Rights (3.) and click on Add group (4.).
Once you selected the user group the group will appear in the list (1.). The contact can be placed in several groups if required.