I stumbled upon this setting because of an exam question where they stated you could set permissions on related contacts of an account in a sharing rule for accounts. But it writes "contract" not "contact".
But generally, what is the "default account" of an account?
If I set it to "Read Only" (or Read/Write) does it matter what the permissions on the acccount itself are?
In a sharing rule for accounts you can set permissions for closely related objects like Contract, Opportunity, Case. But I miss Contact. How do you grant permission to all related contacts of an account?