=(wenn(SVERWEIS(B2;A2:A7;1)=B2;"EXIST";"DOESN'T_EXIST"))
INFO: On english Office Version it's possible that you have to Change "wenn" to "if"
This simple Formular (in Cell.C2) checks the cell "B2" with the Liste "A2:A7" if there exists the value of B2. when the Formular finds value of B2 exists in table it write in C2 "EXIST" or
"DOESN'T EXIST"
I use this command quit often to check a file list with another. Sometimes on larger Filelist you have to take care that it can be take some longer to check all cells, some patience is
requiered than.