Customer Records
The 360° customer view: profile and contacts on one side; the account position — AR/AP balances, invoices, payments, tickets, opportunities and activity — on the other.
Where: CRM → Customer Records 
Customers/partners themselves are the shared partner register (also used by Sales and Accounts); this workspace is where the relationship is read. The account-position header answers "where do we stand with them" before every call.
