Can I generate Access Token for one domain using Client ID and Client Secret of another domain?

Hi,

I am working on Dynamics CRM 2016 integration project. Would like to know whether I can generate Access Token and Refresh Token in below scenario for CRM Online:

Scenario 1:

1. I have Client Id and Client Secret of App1 which belongs to Domain A.
2. I have credentials which belongs to same domain i.e. Domain A.

Scenario 2:

1. I have Client Id and Client Secret of App1 which belongs to Domain A.
2. I have credentials which belongs to Domain B.

Would like to know, can I generate Access Token and Refresh Token in the above scenarios?

Thanks.