Prevent duplicate across multiple column on a row by row basis

pelumi10

New Member
Joined
Sep 12, 2022
Messages
3
Office Version
  1. 365
Platform
  1. Windows
I created a drop down list between 3 columns, I would like to prevent duplicate on a row by row basis between these 3 columns. The first two column is not allowed but the last two is allowed. I'm not sure how to go about this
Untitled 2.png
 

Excel Facts

Copy formula down without changing references
If you have =SUM(F2:F49) in F50; type Alt+' in F51 to copy =SUM(F2:F49) to F51, leaving the formula in edit mode. Change SUM to COUNT.

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