A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
The ship date is not after the promised date in any of the rows (if we exclude 1/0/00), so none of the cells should be highlighted.
Select O2:O100 or however far down as appropriate.
O2 should be the active cell in the selection.
On the Home tab of the ribbon, click Conditional Formatting > New Rule...
Select 'Format only cells that contain'.
Leave the first drop down set to 'Cell Value'.
Select 'less than' from the second drop down.
In the box next to it, enter the formula
=AH2
Click Format...
Activate the Fill tab.
Select yellow as fill color.
Click OK, then click OK again.