If you have purchased more than one Editor license, then you can make use of the License Manager to manage/upgrade/downgrade the licenses of your team members. The administrator who bought the license can even switch the licenses between different users at any point in time.
1Open account details.
2Click the "User Licenses" button in the account settings menu.
3Now enter the mail id of the team member here.
4Then, click on the upgrade button.
Note: The above steps will only set up licenses for your Team Members. In order to share projects, click here.