You are the messaging engineer for your company.
The network contains two Microsoft Exchange Server 2003 servers named Server1 and Server2. Server1 is a back-end server. Server2 is a front-end server. You purchase a new server named Server3 that has the same hardware as Server1 and Server2.
All server hardware supports both the 32-bit and 64-bit versions of Microsoft Windows Server 2003.
You need to recommend a strategy to transition from Exchange Server 2003 to Exchange Server 2007.
Your strategy must meet the following requirements:
Minimize downtime.
Configure the solution to be supported by Microsoft for production environments.
Configure one server to provide Exchange Web Services and message delivery and a different server to manage Mailbox databases.
What should you recommend?
A.
On Server3, install the 32-bit edition of Windows Server 2003. Install the 32-bit edition of the Exchange Server 2007 Client Access server role, Hub Transport server role, and Mailbox server role. Change the MX records and Web services URL to point to Server3. Move all mailboxes to Server3.
B.
On Server3, install Windows Server 2003 x64 Edition. Install the 64-bit edition of the Exchange Server 2007 Client Access server role, Hub Transport server role, and Mailbox server role. Change the MX records and Web services URL to point to Server3. Move all mailboxes to Server3.
C.
On Server2, remove the current operating system and install Windows Server 2003 x64 Edition. Install the 64-bit edition of the Exchange Server 2007 Hub Transport server role and Client Access server role. On Server1, export all mailboxes to .pst files. On Server1, import the mailboxes to the server from the .pst files.
D.
On Server3, install Windows Server 2003 x64 Edition. Install the 64-bit edition of the Exchange Server 2007 Hub Transport server role and Client Access server role. Change the MX records and Web services URL to point to Server3. On Server2, remove the current operating system and install the Windows Server 2003 x64 Edition. Install the Mailbox server role from the 64-bit edition of Exchange Server 2007. Move all mailboxes to Server2.
Explanation:
Minimize downtime. Solution supported for production environments. Eliminates A.Configure one server for Web services and message delivery and another for Mailbox databases. Eliminates B.
Need strategy to transition from Exchange 2003 to 2007. Eliminates C.
All Exchange 2007 server roles can co-exist with 2003 servers. To migrate, you should install server roles in this order: Client Access, Hub Transport, Mailbox and Unified Messaging. Edge Transport can be installed separately from the migration, either before, during, or after the other 2007 roles. After replacing 2003 FE with 2007 CAS, a 2003 mailbox user can still use OWA to access his mailbox thru the CAS /Exchange virtual directory (for example, http://<server FQDN>/Exchange).
http://msexchangeteam.com/archive/2006/09/12/428880.aspx
http://technet.microsoft.com/en-us/library/bb124008.aspx
http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part3.html