New business units can be created in Admin > Settings. The very first panel at the top will allow you to create a business unit. Once you create a business unit, create the divisions to go with it and then assign users to the divisions. The process for a new business unit is: 

  1. Create Business Unit 
  2. Create Divisions 
  3. Assign Users to Divisions 
  4. Create Workflows
  5. Check all settings