I read the post releatd to this same question posted by martincox84 on 09-05-08. We are in the proesses of doning the same thing. My questions is once I trust the new domain, move useres, computer and the exchange mailboxes to the new domain. "Bertling" said the uses could log onto their local computers and select the new domain to log into and keep all the desktop settings, ect for each user. (we do not use roaming profiles). I asume i can use a program like robocopy to copy all the data files off the old domain to the new domain keeping the file security the same for the folders and files. This is because the SIDS for the users are now in the new domain. Is that correct? After everything is moved what happens when i break the trust for the old domain? Will the users still keep their profiles on their local computers whn loging into the new domain? How do i change the users computer domain to the new domain name. If i do change the useres computers domain name to the new domain will they still keep their profiles when they log in? Al;so we use public folders in our exchange group. How do i move it from the old 2003 exchange server in the old domain to the new 2007 exchange server in the new domain?