According to the PMBOK Guide, the project manager should manage stakeholder expectations by communicating and working with stakeholders to meet their needs and address issues as they occur. This includes understanding the stakeholder's concerns, interests, and expectations, and providing timely and accurate information to keep them informed and satisfied. By working to understand the key stakeholder's concerns and providing feedback in regular project status reports, the project manager can maintain a positive relationship with the stakeholder and avoid unnecessary interruptions and conflicts. References: PMBOK Guide, 6th edition, page 540-541, section 13.3.2.4 Manage Stakeholder Engagement: Data Analysis.