Within 10 minutes later, one partner replied to the email saying: Dude, I don’t have MS Project installed on my machine! Any other way for me to view this project plan?įrom what I know, Microsoft has a Word Viewer, Excel Viewer, Powerpoint Viewer for people to download online for free. Once the plan(.mpp file) was completed, we then sent it out via email for all project stakeholders to view and comment on. mpp file for project planning and scheduling purposes. Recently we’ve been working on a few projects which require us to utilize Microsoft Project to open.