We have an AD environment running Exchange 2003. Sometime in the past few months, when a new user is created and we setup their Outlook 2003 client their email address becomes case sensitive. So if we set them up in the AD as "JSmith@web.com, then "firstname.lastname@example.org" will not work. Now I can go back into the AD and change just the email back to lowercase, but I'd rather not have to do that for all of my users. Is there a way to turn off case-sensitivity in Exchange?