How to make one cell mandatory if another cell is blank? - Microsoft Community

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i have excel report staff asked update cells either 1 of 2 columns - each column has different drop down choices.  want make rule states if cell (in column a) blank cell (in column b) mandatory (and vise versa).

can provide details instructions?

thank you!!

moved from: office / excel / windows 10 / office 2016

http://www.contextures.com/xldataval02.html


Office / Excel / Microsoft Office Programming / Office 2016



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