Distributor Authorization Terms, (ii) fill out the registration form for "Distributor" in the AEP portal and (iii) ensure that its resellers are AEPs. Learn about Microsoft CSP partner requirements to sign and verify this unified, digitally accepted Microsoft Partner Agreement (MPA).View VTA Solicitations. See all open and upcoming contracting opportunities in our e-procurement portal. Xbox Publisher License Agreement - Microsoft Corp. Microsoft's 20year power purchase agreement with Constellation Energy, announced Sept.