If you have an Office 365 subscription and want to view Microsoft Project MPP files stored on a SharePoint Online Document library follow the configuration steps below to download and instal Project Viewer 365 Drop Down web part.
Step 1: Click to download ProjectViewer_DropDown.dwp web part from our website
Step 2: Log to your SharePoint admin website and under Office 365 settings select “Site Settings”
Step 3: Under "Galleries" section select "Web parts"
Step 4 Select "Files" tab then select Upload Document option. At this point you will have to indicate the location of our web part file
Step 5: After you selected the file, press OK button.
At this point the Project Viewer DropDown webpart will be shown under the Web Part Gallery.
Step 6: Select your desired SharePoint page and insert the Project Viewer web part above your document library with MS Project MPP files
Step 7: The Project Viewer Drop Down Web Part should be successfully configured at this point. On your page with mpp files, expand the drop down menu and select Open with Project Viewer 365.
Click on “Open with Project Viewer 365” option and the mpp file will be opened with Project Viewer 365. You should see something like this: