Say you need to make a change to a group of users in your AD environment.  Maybe this change isn't simple, such as removing an old  SMTP email address from every user in your domain.  Here is a great tool that can do this and more:

<a class="alignleft" title="ADModify" href="ftp://ftp.microsoft.com/PSS/Tools/Exchange%20Support%20Tools/ADModify" target="_blank">ADModify</a>

 

This utility is very powerful and can make mass AD changes take seconds.  I highly recommend it!