Hi All Initially we outsourced our emial services to an external company. Recently we bought another company which already had exchange server. But we have two different forest now A and B(the new one). We are communicatin between eachother like: 1. File access. 2. Printer access. 3 Terminal server access etc By establising Site-to-Site VPN conection and also creating a stub zone for the other domain for name resolution. Trust relation ship between the forest is in place for future. My question is can I add another domian to exchange server to act as mail service for the other domain. Like exchange server will be able to process emial for both domain A and B. Thank you

Yes, Exchange can accept email on behalf of multiple SMTP domains. They do not require a specific relationship with the name of your Active Directory. How to Configure Exchange 2007 to Accept E-Mail for More Than One Authoritative Domain http://technet.microsoft.com/en-us/library/aa996314(EXCHG.80).aspx

For Exchange 2003, you need to configure another Recipient Policy: http://technet.microsoft.com/en-us/library/aa997797(EXCHG.65).aspx Mike

I guess this is possible because exchange has 1 to 1 relationship with an AD forestThanks & Regards Piyush piyush@lepide.com Lepide Software