There are two areas where you can restrict user access to a company:
The User Maintenance screen (File, Maintain Users, Maintain).
The Set up and Delete Companies screen (File, Set up and Delete Companies).
You can use either area to achieve the same result. For example, to specify which companies a particular user can access, use the User Maintenance screen; to specify which users can access a particular company, use the Set up and Delete Companies screen.
Allow user access to a company
Refer to Give a user access to a company.
Set company access rights for a user
As a supervisor, choose File, Maintain Users, Maintain.
Enter the Username you wish to set company access rights for.
Choose Companies (F7).
Select each company you wish to restrict this user from and choose Unavailable (F7). Alternatively, choose All No (F12), then select each company you wish to give this user access to and
Choose Available (F7).
When ready, choose Accept (F9).