I have enabled whatsapp engagement and template got apporved from quip. we wanted to do whatsapp campaign with banner image with limited numbers (existing salesforce accounts) . i can be able to send notification through process builder for one person. Now we have requirement to run campaign for multiple users (existing salesforce accounts) with banner image. 

Any help is appreciated!.

Hello everyone,

So I've run into a road block and I wanted to post my question here to get a second opinion.

So we set up SSO in Auth.Provider in Salesforce.
We created a My Domain - so when a user enters the My Domain URL, they are automatically redirected to SSO.

I created a custom URL to redirect to the My Domain, but quickly realized that a redirect cannot be sent to a My Domain (instead of going to the My Domain page, it goes to test.Salesforce.com).

My SSO provider cannot set up a unique page for our SF environment.

If we want a costom URL - what can we do to set up a custom URL? Is there any work-around that can be setup through SF to go from a custom URL -> My  Domain?