The Partner Investment Engine (PIE) is a portfolio of offers that allows Microsoft US-Managed Partners to request funds (partner-led) in support of executing key sales and marketing activities with their customers. The programs are well-defined with specific eligibility requirements.
Currently there are three offers in the FY23 PIE Program, each supporting pre & post sales engagements. You can learn more about PIE Programs in the assets below. The tool that partners use exclusively to access PIE in the US is the PIE Portal; head over there if you are ready for the next steps.