A master service agreement (MSA) is a fundamental contract outlining the scope of the relationship between two parties. A Master Service Agreement (MSA) is a document that outlines the terms and conditions upon which work will be performed between two parties.Learn all there is to know about master service agreements, including their scope, how to create them, and how to manage them efficiently. Learn how to write a master service agreement and understand what the contract needs to include in order for the MSA to be. To work locally in either origin or destination city to fill out their workday. Instructions: Pursuant to BNSF's "Rules Governing. Authority for Contracts, Deeds and. This Master Agreement (the "Agreement") is a binding, legal contract between the Kaseya Affiliate specified on Exhibit A based on your billing address. A Master Service Agreement or MSA is critical to a company's success. Master Service Agreement templates should match a company's objectives.