How does the routing system handle existing account relationships?
The account-ownership rule layers on top of any other strategy. A new Lead whose company matches an existing Account routes to that Account's owner regardless of the usual territory or round-robin rules. This single layer prevents the double-coverage failure that is the biggest routing complaint from AEs. For companies that match multiple Accounts (large enterprises with multiple relationships), the rule prefers the most recent owner by default, with a configurable preference for the owner with the most open opportunities.