TechOnTip Weblog

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Migration Path for Exchange 2010

Posted by Brajesh Panda on March 10, 2010

When you are planning to migrate from Exchange 2000/2003/2007 to Exchange 2010, make sure you are considering below parameters;

– Exchange Upgradation Path

– Supported operating systems

– Active Directory Domain & Forest level

A. Exchange Upgradation Path

-No co-existence with exchange 2000. Hence migrate all 2000 mailboxes to either Exchange 2003/7

-Exchange 2003/7 must be patched till latest version of service pack i.e. Service Pack 2

-Exchange 2007 & onwards (Exchange 2010) need completely x64bit hardware

-Due to x64bit architecture now your exchange server can be

Provisioned with much more memory (2 to power 64). It will help to

reduce disk IOPS, Swapping resulting maximum number of mailboxes

in a single mailbox server


B. Supported Operating Systems

  Version Windows 2000 Windows 2003 Windows 2003 x64 Windows 2003 R2 x64 Windows 2008 x64 Windows 2008 R2 x64
Exchange 2000 32bit Yes          
Exchange 2003 32bit Yes Yes        
Exchange 2007 RTM 64bit     Yes Yes Yes  
Exchange 2007 SP1 64bit     Yes Yes Yes  
Exchange 2007 SP2 64bit     Yes Yes Yes Support is coming*
Exchange 2010 64bit         Yes Yes

Support is coming*: http://msexchangeteam.com/archive/2009/11/04/453026.aspx

C. Active Directory for Exchange 2010

Component Requirement
Schema master By default, the schema master runs on the first Windows Server 2003 or Windows Server 2008 or Windows Server 2008 R2 domain controller installed in a forest. The schema master must be running any of the following:

· Windows Server 2003 Standard Edition with Service Pack 1 (SP1) or later (32-bit or 64-bit)

· Windows Server 2003 Enterprise Edition with SP1 or later (32-bit or 64-bit)

· Windows Server 2008 Standard or Enterprise (32-bit or 64-bit)

· Windows Server 2008 R2 Standard or Enterprise

Global catalog server In each Active Directory site where you plan to install Exchange 2010, you must have at least one global catalog server running any of the following:

· Windows Server 2003 Standard Edition with SP1 or later (32-bit or 64-bit)

· Windows Server 2003 Enterprise Edition with SP1 or later (32-bit or 64-bit)

· Windows Server 2008 Standard or Enterprise (32-bit or 64-bit)

· Windows Server 2008 R2 Standard or Enterprise

For more information about global catalog servers, see What is the Global Catalog.

Domain controller In each Active Directory site where you plan to install Exchange 2010, you must have at least one writeable domain controller running any of the following:

· Windows Server 2003 Standard Edition with SP1 or later (32-bit or 64-bit)

· Windows Server 2003 Enterprise Edition with SP1 or later (32-bit or 64-bit)

· Windows Server 2008 Standard or Enterprise (32-bit or 64-bit)

· Windows Server 2008 R2 Standard or Enterprise

Active Directory forest Active Directory must be at Windows Server 2003 forest functionality mode or higher.

N.B: Better to use x64bit Operating System for Directory servers. Hence it will able to hold complete NTDS database in memory reducing Directory Service requests

You will find a good descriptive article at TechNet too http://technet.microsoft.com/en-us/library/aa996719.aspx

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