A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi
Please, try the following
1- I just wonder if you could insert a column for the "Duration of the Project" just in case you might have projects with different periods of completion
2- Then your formula will be =B2+C2 and fill down
3-For the Conditional Formatting
a) Select all the cells you want to apply the CF
b) and use formula =$D2<TODAY()
Please note, Only Column must be locked with $, but not the row
3- To lock DUE DATE cells, Please check this video
https://www.youtube.com/watch?v=wrOE8fheMR0
Hope this helps you.
Do let us know if you need more help
Regards
Jeovany