I've install exchange 2007 sp1 with windows server 2008 rc1 on one server (the server have 2 processor quad core and 8 gb of memory). the name of the domain controller is tommasosimone.it the name of the pc is tommail in exchange i've in organization unit - hub transport this setting remore domains: nuovaairetcnica.eu tommasosimone.it accepteddomain tommasosimone.it nuovaairetcnica.eu email policies nuovaairtecnica.eu tommasosimoen.it with this configuration i can create user and the user can receive mail form the domain tommasosimone.it or form the domain nuovaairtecnica.eu BUT THE PROBLEM IS THE THE USER TO ACCESS TO your email must login with the user that have in Active Directory Es. user in active directory is tommaso.simone@tommasosimone.itand in exchange have e-mail tommaso@nuovaairtecnica.eu in this case you can receive mail and send mail to the e-mail tommaso@nuovaairtecnica.eu but to access to the mail box i've necessary to insert tommasosimone\tommaso.simone I WANT THAT I USE TO ACCESS TO MY MAIL BOX I USE THE SAME NAME OF MAIL ADDRESS IT'S POSSIBLE? Thanks for all ad regards Tommaso