Associating Orgs for Clients/Sub-Clients

We have a use case for the Zendesk platform that I am trying to understand how to use Zendesk to achieve our aims.

Background

We are utilising Zendesk as a ‘Helpdesk’ platform to handle end-User requests, track time, and bill any associated time. The ‘Helpdesk’ is made available to two types of Clients:

1. B2B - A ‘Helpdesk’ direct to end-Users. The end-User is associated with an Organisation through a single domain
2. B2B2C - We ‘whitelabel’ advisory for Legal and Finance companies, and they provide our advisory to their Clients (“sub-Clients”).

We have two ticket forms (with conditional fields):

1. B2B - A standard ticket request form
2. B2B2C - An additional form field is added for a Sub-Client email(s)

Example

Legal Co. use our Helpdesk to request internal support, or support on behalf of their Clients. We wish to associate Legal Co. (domain: @legalco.com), with the sub-Client organisations (domains: @acme.com, @tesla.org, etc.)

• When raising a ticket, the Client will add a sub-Client email in a ticket field - along with other details (like a ‘cc)
• Legal Co. advisors wish to see all tickets (and correspondence) associated with their sub-Clients.
• Sub-Clients should only be able to see tickets (and correspondence) associated with their organisation

We may also wish to ‘tag’ the tickets for reporting purposes.

Request

We are looking for some guidance on how associate ‘Organisations’ or ‘End-Users’ (Clients and sub-Clients, as outlined above), so there is visibility for the Client with their Sub-Client’s ticket requests.