Can exchange 2003 and 2010 coexist(Bridgeheads)?

Yes they can coexists. You can maintain your old exch 2003 servers with new exch 2010. For details: Exchange 2003 - Planning Roadmap for Upgrade and Coexistence Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

You can deploy Microsoft Exchange Server 2010 in an existing Microsoft Exchange Server 2003 organization operating in native mode. Coexistence with these two Exchange versions is supported. This topic provides an overview of the planning considerations and configuration steps that you must take when Exchange 2010 will coexist with Exchange 2003. http://technet.microsoft.com/en-us/library/aa998186.aspx Santhosh Sivarajan | MCTS, MCSE (W2K3/W2K/NT4), MCSA (W2K3/W2K/MSG), CCNA, Network+ Houston, TX http://blogs.sivarajan.com/ http://publications.sivarajan.com/ This posting is provided "AS IS" with no warranties, and confers no rights.