"I've found that with some projects, you start with a lot of unknowables. In this situation, I would reach out to the new stakeholder right away. Instead of overwhelming them with details and updates about the project during the first meeting, my focus would be to discuss the project at a high level. I will show them that they are a vital part of the project and clearly explain their role. My second meeting with them would be focused on identifying the different milestones that they will own. Throughout the process, I'll assure them that I will be their main point of contact, should they need information or help in completing their tasks. I will also make sure that communication lines are open between the stakeholders and everyone has eyes on our collective progress."