Team Owner:
Click "Invite a user"
Search for the user
Once found, highlight the user and check "Send an invitation by email" if desired then click "Add"
If "Send an invitation by email" was not selected, notify user and have them do as below from (b.)
Prospective Team Member:
a. User accepts email invitation
OR
b. User logs into Virtual Office
User clicks on "Manage Virtual Team"
In the "Virtual Team Inbox" user highlights the team name
Click "Join"