Creating multiple portals for different brands

Creating multiple portals for different brands

I want to set up two portals: one for brand A and the other for brand B. Each brand has its own support department.

The default portal has been allocated to brand A and department A. Its URL is support.mydomain.co.uk. I've set up a second portal for brand B which is linked to department B. I want brand B users to access this URL via brandbsupport.mydomain.co.uk.

Have I understood this correctly? Does each brand have an unique URL or do customers access the support site via support.mydomain.co.uk, choose their brand, and THEN login to the respective portal? I have mapped both support.mydomain.co.uk and brandbsupport.mydomain.co.uk via CNAME entries to Zoho. However, when accessing domain mapping, there is only the ability to enter a single domain which, for us, is support.mydomain.co.uk.

Can you explain how this should be set up? The two portals will be very different and will service unique customers. For clarity, customer A will have brand A support (support.mydomain.co.uk) and customer B will have brand B support (brandbsupport.mydomain.co.uk)

Also, once set up (whichever is the best way), can I auto-invite new contacts to their respective portal based on the value of a custom field? Desk is linked to CRM via a one-way sync (CRM-> Desk.)