We have always had two SMTP addresses for each user's mailbox. For some reason, my ADC has changed all my users Primary SMTP (reply to) address to alais <mailto:alais@xxxxxxxxxx> @domain.com instead of firstname.lastname@ <mailto:firstname.lastname@xxxxxxxxxx> domain.com Changing these all back could take weeks, does anyone know how to fix this with a script? Does anyone know how this might have happened? Thanks , SB