1. Be aware of which Excel file fields will be mapped to which Project Plan file fields before starting the Import Wizard.
2. Not all fields in the Excel field are required to be imported. When mapping the columns from your file you will have the opportunity to pick which fields you will import by deleting the unnecessary ones (using the Delete Row button).
3. Make sure you know which Excel file tab names will be imported into which data areas within Project Plan. e.: Task data, Resource data.
4. Be aware if your import file has column headers.
5. Blank lines in the Excel file will be imported as blank lines in the project file.
6. Start and Finish dates when imported into the Start and Finish fields in Project Plan 365 will create Start No Earlier Than constraints for the tasks.