Hello,
Recently, I have installed the "Customer Self Service Portal".
I have added in the "Case" entity a Country field (Option Set) which contains a list of countries, and I have created another Country field (Option set) in the "Account entity".


What I want to achieve is the following:
When I open a new case with a current user, the customer and contact field by default are auto-populated for this user.

Therefore,I want to implement the same process to auto-populate the country value from the "Account" entity for this current signed-in user and make this field as "Read-only or (disabled)".
As a result, when I click on "Open a new case" the country field will be filled for the users so they don't have to choose the country from the drop-down.
Can someone please explain in detail and provide an example to achieve the following scenario?
Any help would be greatly appreciated.
Thank you!