A1 - Jones B1 Y
A2 Smith B2 Y
A3 Doe B3 N
A4 Murphy B4 Y

Let's say I want to search for "Doe", and if I find one then I want to
change the entry in column B to "Y". If column A is not "Doe", however, I
want to leave column B as is. What kind of a logic statement leaves the B
field as is if the condition in the row A is not met?

Tried a lot of things - no joy.
Thx
Dave