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32 or 64 Bit Install for Server 2008

missmuppet asked
Last Modified: 2012-08-14
I am in the process of building a Terminal Server for a customer on and HP 350ML server. At this stage the box will primarily be used for TS services. In the long term I may consider installing exchange 2007 as we migrate from their SBS 2003 standard server.

As I understand it Exchange 2007 has to be installed on a 64 bit installation and will not run on 32 bit installed OS. If I installed the OS as 64 bit what will happen to TS applications that I need to install that are only 32 bit. I am looking at installing Office SBE and some Accountanting applications like MYOB and Accountants Office.

Will these still run if the OS is installed as 64 bit or would I have to install as 32bit. If I install as 32 bit now and want to install exchange at a later date I assume it would be a complete rebuild of the server?

Never run any 64 bit OS so all a bit new to me,

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the new support for itanium processors with hyperV will give you performance gains through the cut-down clients and better management with 2008.
Your right that exchange 2007 is not intended for production on 32 platforms and has no option for registering your licence..
Office and most programs now are tested for 64 bit, however I dont know about myob specifically.
You can run 32 apps on a 64 bit PC in emulation, but that doesn't always work, so some testing would be worthwhile.
I'd also look at the 2008 server compatibility with your apps, you may find they are not ready yet...


Thanks for your quick answer, the main application is AO which as I understand it will run on Vista, I will however try it on a virtuall machine I have here?

Also could you clarify your first sentance

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tigermattSite Reliability Engineer
Most Valuable Expert 2011

missmuppet, you are correct in saying Exchange 2007 requires a 64-bit installation of Windows Server to run. Also, bear in mind that Windows Server 2008 does NOT support any version of Exchange except Exchange Server 2007 SP1 at this stage.

If you install the 64-bit edition of the OS, you would need to also source and install 64-bit editions of the drivers for the server. Almost all new servers have these today though - if they don't, the manufacturer must be awful.

Regarding debuggerau's comment on Hyper-V - Hyper-V is basically a new form of virtualisation which you get with Server 2008. Rather than other editions of Microsoft's server virtualisation software Hyper-V runs in a reduced Windows environment and uses the CPU to do "hardware assisted virtualisation", so you get excellent performance and reliability out of it. I don't think in your circumstances you will need to worry about Hyper-V at this stage.


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