Meeting with the project sponsors to align expectations is a crucial step for the project manager to ensure that the project objectives, scope, deliverables, risks, assumptions, and constraints are clear and agreed upon by all the stakeholders. This will also help to establish trust, communication, and collaboration among the sponsors who are from different business units and have different interests and perspectives. The project manager should also review the project charter and the stakeholder register to identify the roles, responsibilities, and expectations of the sponsors and other key stakeholders. Establishing mentoring and coaching sessions, reviewing the knowledge repository for similar projects, and scheduling the project kick-off meeting are all important activities, but they are not the first thing that the project manager should do in this situation. References: = PMBOK Guide, 6th edition, pages 31-32, 513-514; PMP Exam Content Outline, 2020, pages 6-7.