To add a user to Dropbox for Business, they have to be invited and then accept the invitation. After they accept the invitation, then you can add them to groups.


First, login to dropbox.com with your corporate username. Then select Admin Console from the left-side navigation menu.


In the Admin Console, select Members and then click the Invite Member button on the right side.



Then enter the email address of the person to be added and click the Invite button. If you don't have any available licenses, you will have to confirm the purchase.


After the user accepts the invitation, then you can add them to groups to give them access to files. Select Groups from the left-side menu.


Select the group to modify its membership. Click the Add Members button on the right-side.


Type the names of the members to be added and click Add Members.


The members will be added to the group and be granted access to associated files ad directories.