How can I share a project plan with users who aren't assigned to the project?
Project managers can share a project plan in four ways: print the project plan, provide view-only access to the project plan, export it to Excel, or use the Project Management - Planning Real Time subject area.
To provide view-only access, open the View-Only Project Plan Access section of the Edit Project Details page. Then select whether to give access to all users or just the project team and participants. Keep in mind that resources whose status is Canceled can't access the project.