Hi We have a Windows 2000 AD Domain with an Exchange 5.5 organisation with 4 remotes sites located in remote locations. I installed Exchange 2003 on a Windows 2003 member server in SiteA. This server has the ADC installed with 4 CAs. I have moved the users from SiteA into Exchange 2003 with no problems. I plan to install Exchange 2003 on new Windows 2000 servers in the remote sites and move users using the wizard. The question is do I need ADC installed on these remote sites servers with CAs so that I can move users. Will these CAs be two-way.?? Is there anything else I would need to do.?? Thanks Email disclaimer: This email and any attachments are confidential. If you are not the intended recipient, do not copy, disclose or use the contents in any way. If you receive this message in error, please let us know by return email and then destroy the message. Environment Bay of Plenty is not responsible for any changes made to this message and/or any attachments after sending. ****************************************************** This e-mail has been checked for viruses and no viruses were detected.