We want to roll out a partner community but I'm not sure what the best way is to configure access for our partners.  Our Partner Accounts are owned by an internal Channel Manager.  I have Partner Contacts enabled as Partner Community Users.  I also have Customer Accounts that our Partners Users manage.  However these Customer Accounts are also owned by internal users.

1) How do I set up visibility to allow each Partner User to have visibility to all Cases related to their Partner Account.

2) What are my options for displaying the Accounts our Partners manage but are owned by internal users?