How to Migrate Exchange 2003 32 bit to Exchange 2007 64 Bit Server

lianne143
lianne143 used Ask the Experts™
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Hi
We have a Dell 32 bit server  and  windows 2003 server and exchange 2003 running on it. We have two different domains running on our network  and all our servers on our network are 32  Bit windows 2003.  
Domain-A has 100 users where this group is  configured to use exchange 2003/outlook 2007.

Domain B has 300 users and use  different email system (Not Exchange).
Now Domain-B users says they are not happy with the existing email system  and they  say they  want outlook web access.

Firstly i dont have enough space on my existing  exchange  server  to create access to all Domain -B users.
Secondly if i have to create access to all Domain -B users for outlook , i need to buy higher capacity  hard disk for this 32 bit server and increase the space and reconfigure exchange 2003 for Domain A and Domain B to use exchange.
Is it a good idea to buy a Dell 64 bit server and install exchange 2007 and migrate all the mailbox of  Domain -A users  and Domain- B users. Will this cause a compatability issue with other 32 bit servers on our network and will this setup work.

Please suggest how to go head and any  ideas appreciated
Thanks
 
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you definitely need a x64 server to host whatever version of exchange you choose. i say whatever version because you may want to think about jumping to 2010. the improvements in disk io from 2003 to 2010 is about 90%. you can also deploy your mailbox server and then if you want to add high availability later, deploy another server and create a database availability group (dag).

i would definitely look at a migration to a new version.
AkhaterSolutions Architect
Commented:
Exchange 2007/2010 is a leapfrog from exchange 2003 and it would be a wise investment.

on the downside you need to "re learn" the product since it is almost completely a new one compared to exchange 2003 so you will need to give yourself some learning curve time but it is worth it

here is a 3 part step-by-step tutorial on how to migrate from exchange 2003 to exchange 2007/2010 in case you need it

http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part1.html

Author

Commented:
Hi
The tutorial says that,  You must make sure that the Exchange organization is set to Native Mode (no pre-Exchange 2000 servers) as shown in Figure 1.1 below. When i opened my exchange server  properties, under operation mode it says its in the Mixed Mode(can support pre exchange 2000 servers)
and this option is greyed.
Below it says  change operation mode and if i click change mode , it  says once this operetion is complete , the mode of this organization cannot be set back to mixed mode. Are you sure you want to change the mode of this organization to native mode.

Do i need to change this  really to native mode to do the transition from exchange 2003 to 2007.
Thanks
yes, you cannot have any 5.5 servers in the exchange organization when you go to 2007
AkhaterSolutions Architect
Commented:
yes you need to change this.

any idea whay the option is greyed ? do you have a 5.5 server in your organization ? maybe an Active Directory connector ?

Author

Commented:

Domain-A has 100 users  and Domain B has 300 users (from different Email System)
If i  do the transition from the old servers to new server, how much of HD space is required on a raid 5
can you please speck for a good Dell / HP servers
Thanks
AkhaterSolutions Architect
Commented:
the number of users is not relevant you need to know the actual data that you need to host on your servers
check out the storage calculator provided by the exchange team
http://msexchangeteam.com/archive/2008/11/04/450039.aspx
AkhaterSolutions Architect
Commented:
The storage calculator would only give an estimate since he already know the current data size on his exchange this will give him a much better understanding about the size required
the storage calculator will give you a better understanding of the recommended disk layout (number of disks for the raid to accomodate the disk iops)

you could get a 1tb disk but it might not have the iops to handle the number of users

Author

Commented:
The option which is greyed is
Mixed Mode(can support pre exchange 2000 servers)
and we dont  have any  5.5 server in my organization ,except a linux based email system for the  300 users  which are in Domain- B  which iam planning to move the mailbox to the new exchange 2007.
AkhaterSolutions Architect
Commented:
ok so it is safe to change it to native mode no issues

Author

Commented:
If i buy 64 bit server is it better to install windows 2008 R2 and Exchange 2007 on it
or to install windows 2003  and Exchange 2007 on it. Because all my domain controllers and other servers runs on my network are windows 2003 32 bit.
unless you are installing 2007 sp3 you cannot use r2
i wouldn't install it on 2003

Author

Commented:
When i go to the download section of exchange 2007 under my microsoft volume licencing  i  can see only Exchange Server Enterprise 2007 w/SP1
so do i need to install Exchange Server SP2  on top of SP1
and finally Exchange Server  2007 SP3

Thanks
you should be able to download sp3 from microsoft's public website
it contains all the bits you need for install
AkhaterSolutions Architect
Commented:
go here http://www.microsoft.com/downloads/details.aspx?FamilyID=1687160b-634a-43cb-a65a-f355cff0afa6&displaylang=en and download exchange 2007 sp3 and use it to install exchange on windows 2008 R2 (64 bits)

Author

Commented:
Sorry iam not clear, i just want to know the sequence of installing  exchange 2007 on 2008 R2 (64bits)
At the moment i have the CD of Exchange Server Enterprise 2007 w/SP1 in hand

secondly i will  install Exchange Server Service Pack 2  on top of Exchange Server Enterprise 2007 w/SP1

and finally install Exchange Server  2007 SP3  on top this

Is this right.
Thanks

no, just install exchange 2007 sp3

Author

Commented:
Hi
Now my boss has told me to look at virtulization of all my servers. so iam  planning to build a 64 bit virtual  server for my exchange 2007 . In the case of virtulization  can i increase the space of the  the virtual  hard disk if  the VHD space grows or do i need to caluculate the  specks of my exchange  server in advance before i could implement.
Thanks  
depends on the type of virtualization you are using, but you can expand a disk volume on some

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