How to create multi-tenant and login with Domain Users in vRealize portal?
You can create the tenants in the default tenant and create a local user with tenant admin and Infrastructure Admin privileges in each tenant. Then logon to each tenant with the local account you created, then configure directories management for the required identity source in each tenant.
Is this what you mean with your question?
Check this out this blog post, you can add a tenant within this process:
http://www.virtualjad.com/2017/02/vra-7-2-dig-07-initial-tenant-configuration.html
In the other parts of this comprehensive description you will find all that is needed to set up a tenant correctly.