
Originally Posted by
JohnTopley
Try
=IF(INDEX(Sheet1!$C:$C,MATCH($A2,Sheet1!$A:$A,0)+MATCH(B$1,Sheet1!$B:$B,0)-2) < TODAY(),"x","")
This assumes heading(s) in row 1 and data starting in row 2
Or
=IF(INDEX(Sheet1!$C$2:$C$1000,MATCH($A2,Sheet1!$A$2:$A$1000,0)+MATCH(B$1,Sheet1!$B$2:$B$1000,0)-1) < TODAY(),"x","")
Change 1000 to your anticipated maximum number of rows
The $ signs are for "absolute" cell references so
$A2 will always refere to column A as you drag the formula ACROSS columns
B$1 will always refer to row 1 as you drag DOWN rows
$A, $B and $C fix these columns
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