Can I add to my team a team member that is already in another existing team?
To add a team member that is already in another existing team, go to “Team” menu and click the “Add Member” button. Type the email address of the team member you want to add and click anywhere in the dialog. A dialog will appear immediately, and it allows you to invite the team member to your team. Right after you click the “Invite” button, an invitation will be sent to the entered email address. If user accepts the invitation, he will be added to the new Team with a Read Only role.