Only organization Owners and Supply Manager Members can create and manage default domain lists. Domain lists can be applied at the Organization or Account level.
To assign a domain list to one or more accounts, but not the entire organization, first create the Allow or Block list, then hover over the list you want to assign to specific accounts.
Click the Show Details button.
On the right of the screen, the details panel will open. In the Account Access field, enter the name of the account(s) where you want to apply the domain list.
To make this a default list, click the Account default toggle to on.
Click Save.