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• Wednesday, June 20. 2007 Allwyn wrote:
  I dont find any reason why it shouldnt work
  
  Regards
  Allwyn
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• Thursday, June 21. 2007 Ismail wrote:
  Hi ally..
  
  Exchange 2007 will only work on 64-bit servers. Actually, Microsoft has created a 32-bit version of Exchange 2007, but it is intended solely for testing and training purposes, and will not be supported in a production environment.
  
  A 64-bit operating system allows Exchange Server 2007 to overcome the memory constraints that Exchange 2003 faces today. The 32-bit version of Windows Server 2003 uses a 4 GB memory model. By default, 2 GB is reserved for kernel-mode processes; the other 2 GB is used for user-mode processes.
  
  May be this could be the cause why inplace upgrade is not possible from exchange 2003 to exchange 2007...
  
  If inplace upgrade won't work then i believe exchange 2007 in the production environment should not work on 32 bit....
  
  For 32 bit they have created exchange 2007 RTM.
  
  Regards,
  Ismail
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  1. Thursday, June 21. 2007 Allwyn wrote:
     Ismail,
     
     Thanks for your inputs,The first para is right but Microsoft came up with this architecture because of the limitation of 32 bit architecture where if you add more than 4 GB of RAM it does not improve performance (VM errors and Warnings we faced),
     The reason why there is no inplace upgrade from earlier version is major architecture changes in Exchange 2007
     Inplace uupgrade not use to work from Exchange5.5 to Exchange 2003 but still both of them use to work in production.
     
     They reason for 32 bit Exchange 2007 was so that Customers dont invest in new hardware to test any beta versions of any product (if incase anyone does not like the product dont you think he would feel why he bought a 64 bit Server)
     
     Regards
     Allwyn
     Reply to this
• Thursday, June 21. 2007 Ismail wrote:
  please check this also
  
  Q. Why isn't Microsoft also delivering a 32-bit version of Exchange Server 2007?
  A. Exchange Server 2007 is designed to be a stable, reliable enterprise messaging platform that delivers the fundamentals of e-mail and calendaring while providing innovative new capabilities. These new capabilities make the messaging system more cost effective and scalable for your organization and at the same time more productive for users accessing the system. Simply put, given the new capabilities of Exchange Server 2007, Microsoft could not guarantee a high-quality 32-bit version.
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• Thursday, June 21. 2007 Ismail wrote:
  hi Ally,
  
  Thanks for the input, Yes i agree 64bit is very costly and if they disappoint with their 64 bit application then it will be huge loss. But i think based on the 32 bit support they can come to know about the features and other stuff of exchange 2007. if they don't like then can reject the offer otherwise they have to bear it ... (
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• Thursday, June 21. 2007 Dominic wrote:
  Some info: ( old )
  
  Information from Microsoft Website ; FAQ.
  
  
  Question. Why did Microsoft make the decision to offer Exchange Server 2007 as a 64-bit application?
  
  A. Exchange has been operating within the same 32-bit architecture for the past 10 years, since Exchange 4.0. The messaging environment has evolved over time into a mission-critical application for most businesses today, and demands placed on messaging systems will continue to grow. We witness this growth through the increase of e-mail traffic and larger attachments that now require larger mailboxes to store these messages. Users are also accessing their e-mail in more ways, such as with mobile devices, through Web browsers using Outlook Web Access, and other applications, including Microsoft Office Communicator, MSN desktop search, and Microsoft Customer Relationship Management (CRM) applications.
  
  Trends indicate that demands on messaging systems will continue to grow and 64-bit servers provide the system architecture to meet these demands while reducing costs within organizations through server and disk storage consolidations. With a larger addressable space, the Exchange servers can utilize more memory thereby reducing the required input/output per user (IOPS), enabling the use of larger disks as well as low cost storage such as SATA2 drives. Testing at Microsoft has shown an IOPS decrease of approximately 70 percent with Exchange Server 2007 on 64-bit hardware. Early customer deployments have been able to directly translate this into an increased utilization of current drives in their storage area networks (SAN) as well as new direct attached storage (DAS) topologies, thus significantly reducing their storage costs, which make up roughly 80 percent of hardware capital costs today.
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  1. Thursday, July 05. 2007 Prabhat Nigam wrote:
     Microsoft have not released 32bit exchange 2007(forget beta). So there can't be a question of installation. You can check the downloads option in MSDN download if you have access else I will send the screenshot. Prabhat
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