Background Information
When you save a project as an .mpp file, the project is referred to a non-enterprise project because it is saved outside the Project Server database.
Warning: Do not open the .mpp project file, click File - Save As, and then save the file directly in the Project Server database.
Resolution
The manager of the .mpp project file should complete the following steps to import the project into the Project Server database:
1. Launch Microsoft Project Professional and log into Project Server
2. Click Tools - Enterprise Options - Import Project to Enterprise
3. On the Welcome page, click the Next button
4. Navigate to the folder containing the .mpp project file, select the file, and then click the Import button
5. On the project information page, name the project according to your organization’s naming convention, specify values for all custom enterprise Project fields, and then click the Next button
6. On the resources page, map every resource in the .mpp file with enterprise resources in the Enterprise Resource Pool and then click the Next button
7. On the task fields page, map local task fields with enterprise custom tasks, if appropriate, and then click the Next button
8. On the calendar errors page, specify an enterprise base calendar for any task triggering an error, and then click the Import button
9. Click the Finish button