I am looking to compare two columns, a "Roster" column and a "Present" column and highlight any missing values.
The "Roster" column is a fixed value, but the "Present" column is a formula matching a name to an attendance code.
I have tried countif, unique, match, and pretty much every other type of formula to make this work, but I cannot get it working properly. I have attached a sample worksheet below, any help would be GREATLY appreciated!
(I have this working in Excel with Conditional Formatting and Unique Values but Google Sheets is another beast).