User account for only particular employees

Hi Everyone,

We have hired 300 employees via HDL. But the customer ask is to provide the application access to only 200 employees. We provided METADATA|PersonUserInformation|PersonUserInformationId|PersonId|GeneratedUserAccountFlag

GeneratedUserAccountFlag - to N while loading employees.

When I run the LDAP process, the user account is getting created for all the employees.

We are differentiating the employees as onrole and offrole through worker category field in assignment page.

Any solution on how to create user account only to 200 employees(onrole)