The PI/PO environment maintains routing relationships that PI/PO Servers use to route MessageObjects from one business partner to another. You and your business partners create and maintain the routing relationships in the PI Integration Directory. Each routing relationship identifies a sender endpoint and a receiver endpoint.

Each business partner can have many sender and receiver endpoints.

When you create a routing relationship, you assign one or more receiver endpoints to each of your sender endpoints. When you send a MessageObject to a business partner, you provide a sender endpoint for that MessageObject. The PI/PO Server finds the assigned receiver endpoints and routes the request to the appropriate business partners.