title: Excel - Need to find if anything from column A is found within column B
body: <p>Basicaly, I have 2 lists of email addresses in Excell...</p>
  
  <pre><code>Column A = Holds over 2051 rows of email addresses
  Column B = Holds about 1994 rows of email addresses
  </code></pre>
  
  <p>I need a way to find out which email addresses in Column A aren't found in Column B, and preferably output the results in, either a new sheet, or in Column C.</p>
  
  <p>Than after that I need to be able to find which email addresses in Column B aren't found in Column A (if any) and output that list into, either a new sheet or Column D.</p>
  
  <p>How can I do this?</p>