• From Setup, enter Installed Packages in the Quick Find box, then select Installed Packages to find the installed package that has available licenses.
  • Click the Manage Licenses link next to the Mass File Download name.
  • Click "Add Users."
  • Choose a view from the drop-down list, or click "Create New View" to build a new custom view.
  • Click a letter to filter the users with the last name that corresponds with that letter, or click All to display all users who match the criteria of the current view.
  • Select users.
  • To select individual users, use the checkboxes. Selected users are listed in the Selected list. When the list includes all the users to whom you want to assign licenses, click Add. 
  • To select all users for the current view, click Add All Users, then click OK.