Root User In Multi Tenant AsterCTI have control over all the Companies he want to manage inside tenant.
Root User Must have to create company and then Company User can Create associated users under there company.

STEP 1 : Logged in with Root User (Credentials used while Registration on Multi Tenant AsterCTI).
STEP 2 : Create  Company.

STEP 3 : View Company and manage license for Particular Company.
a) Goto View Company From Left panel and click on View & Edit button, show in image below :

b) Manage and View License for Company.