I'm changing everything... This is a Rule that we have to set on our AD and on the Exchange Global List.... I used the ADModify.NET to make a bulk change on what was possible (you know... a lot of mistakes had been made on the previous administration, like, wrong P.O Box number, etc... simple things but huge effects!). Now I tried the ldifde to creat a list of the objects on the AD and now I'm changin one by one on the txt file.... BORING.... I think that Mother Microsoft should do something about this amazing service that is the AD.... Does anyone knows here I can find something that I can change the logic that creates the Dysplay name??? Like... the default setting is <First Name><Initials><.><Last Name> TKS Friends!!!