The project manager should use the PMIS to share information with the new stakeholders, as this is the most effective and efficient way to communicate project information and ensure that everyone has access to the same level of detail. The PMIS is a tool that supports the project manager in performing the processes of project integration management, project communications management, and project stakeholder management.
The PMIS can include software applications, web-based systems, databases, and other technologies that facilitate the collection, integration, analysis, and dissemination of project information. The PMIS can also help the project manager to monitor and control the project performance and status, as well as to manage changes and issues. The PMIS can also provide a platform for collaboration and feedback among the project team and stakeholders. By using the PMIS, the project manager can ensure that the new stakeholders are informed and engaged in the project, and that their concerns are addressed in a timely manner. References:
PMBOK Guide, 6th edition, pages 89, 377, 523, 540.