Observers can view the project, but cannot make any changes, except to update tasks to which they are assigned.
Team or Professional Edition license holders can grant an unlimited number of Resources with Observer access to anyone who also has a paid edition of Viewpath.
Team Edition users can also add up to 2 Observers who are on the free Starter Edition.
Professional Edition users can add up to 4 Observers who are on the free Starter Edition.
This is perfect for sharing your project plan with upper management or clients.
An Observer will be able to see the entire project schedule, but cannot edit to the project. If an Observer is assigned to a Task, they can update the % complete, add comments, view documents on those tasks. But beyond that, you are in total control of the schedule.