Třeba nějak takhle:
=IFERROR(
ADDRESS(
MIN(IF(B2:AD100="example"; ROW(B2:AD100); 1048576));
MIN(IF((B2:AD100="example") * (ROW(B2:AD100) = MIN(IF(B2:AD100="example"; ROW(B2:AD100); 1048576))); COLUMN(B2:AD100); 1048576));
4
);
"Not found"
)