Dear Techies,I have two mail servers in my organization. one is hosted in our LAN with exchange 2003. And the other is hosted in different location (ISP). both are working fine, both mail servers has individual user accounts and indivudual databases, Now i want to merge the external mail server (hosted with ISP) with my Internal Mail Server (LAN) exchange 2003 environment, I want to remove the external mail server (hosted with ISP) completley. Is there any way to merge that external mail database to the existing one in my environment?Thanks in advance for your support.Regards,Phani Kumar .B

Dear Phani, Based on the conversation, I understand that you want to merge the mailbox database which is hosted at your ISP into your Exchange server database. I want to confirm the following information: Is the mailbox server hosted at your ISP Exchange? If it is Exchange server 2000 or 2003, based on my research, I found that we can do that by performing the following steps: 1. First we should create trust relationship between the source and destination domain. 2. Use the ADMT to migrate user accounts with the SID and create user accounts in Active Directory that are turned on, 3. Then use the Migration Wizard to import mailbox information. For more information about ADMT, please refer to the following article: How to use Active Directory Migration Tool version 2 to migrate from Windows 2000 to Windows Server 2003 http://support.microsoft.com/kb/326480/en-us How to migrate objects from one domain to another in the same forest http://support.microsoft.com/kb/555229/en-us How to use the Exchange Migration Wizard to migrate mailboxes from an Exchange organization http://support.microsoft.com/default.aspx?scid=kb;EN-US;328871 If anything is unclear, feel free to let me know. Regards, Rock Wang - MSFT