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Home » Microsoft » Windows Server » Windows Server General Help » Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s?
Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s? [message #163719] Fri, 05 June 2009 11:41 Go to next message
eggedd2k  is currently offline eggedd2k  United Kingdom
Messages: 39
Registered: July 2009
Member
We're currently planning on replacing both our domain controller and
our Exchange server.

Ideally we want Windows Server 2008 - and preferably Windows SBS 2008
on our Exchange server.

A couple of software packages we use aren't 64-bit compatible
therefore our domain controller will need to run the 32-bit version of
Windows Server 2008. The Exchange server however we will obviously
have Exchange Server 2007 (part of Windows SBS 2008) which is 64-bit
only.

I need to find out whether or not you can run a 32-bit operating
system on your domain controller (in our case Windows Server 2008) and
a 64-bit operating system on an Exchange server (SBS 2008).

Will the 32-bit and 64-bit o/s co-exist on the same network and
communicate with one another no problem?
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s [message #163720 is a reply to message #163719] Fri, 05 June 2009 12:14 Go to previous messageGo to next message
lanwench  is currently offline lanwench  United States
Messages: 1684
Registered: July 2009
Senior Member
BadBoy House <chrisnrach17@aol.com> wrote:
> We're currently planning on replacing both our domain controller and
> our Exchange server.
>
> Ideally we want Windows Server 2008 - and preferably Windows SBS 2008
> on our Exchange server.
>
> A couple of software packages we use aren't 64-bit compatible
> therefore our domain controller will need to run the 32-bit version of
> Windows Server 2008.

That isn't possible. SBD2008 is 64-bit only.

> The Exchange server however we will obviously
> have Exchange Server 2007 (part of Windows SBS 2008) which is 64-bit
> only.

And you can't split Exchange off onto another server in SBS anyway.
>
> I need to find out whether or not you can run a 32-bit operating
> system on your domain controller (in our case Windows Server 2008) and
> a 64-bit operating system on an Exchange server (SBS 2008).
>
> Will the 32-bit and 64-bit o/s co-exist on the same network and
> communicate with one another no problem?

Buy SBS008 Premium. It will allow you to run either 64-bit or 32-bit W2008
on the second server (the SBS2008 box has to be 64bit, as mentioned).

You really don't want to be running your LOB apps on your SBS box / DC /
Exchange server anyway. A member server is a better place for an app server.
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s [message #163743 is a reply to message #163719] Sat, 06 June 2009 06:31 Go to previous messageGo to next message
meiweb(nospam)  is currently offline meiweb(nospam)  Germany
Messages: 1307
Registered: July 2009
Senior Member
Hello BadBoy,

You can mix 32bit and 64bit version OS in a domain without any problem. What
you can't is to "extract" Exchange from SBS, it has to stay on the SBS, where
2008 requires 64bit.

So as Lanwench mentioned use the Premium version to have an additional server
with either 32bit or 64bit. Or install, if you have 2008 SE or EE 32bit available,
that server as a member in the SBS domain.

Additional applications should never be run on domain controllers, always
on member servers. A DC should do it's basic job with AD/DNS/GC and maybe
DHCP or be a SBS version which are special built to run Exchange for example,
on it.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> We're currently planning on replacing both our domain controller and
> our Exchange server.
>
> Ideally we want Windows Server 2008 - and preferably Windows SBS 2008
> on our Exchange server.
>
> A couple of software packages we use aren't 64-bit compatible
> therefore our domain controller will need to run the 32-bit version of
> Windows Server 2008. The Exchange server however we will obviously
> have Exchange Server 2007 (part of Windows SBS 2008) which is 64-bit
> only.
>
> I need to find out whether or not you can run a 32-bit operating
> system on your domain controller (in our case Windows Server 2008) and
> a 64-bit operating system on an Exchange server (SBS 2008).
>
> Will the 32-bit and 64-bit o/s co-exist on the same network and
> communicate with one another no problem?
>
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/ [message #163784 is a reply to message #163743] Mon, 08 June 2009 04:36 Go to previous messageGo to next message
eggedd2k  is currently offline eggedd2k  United Kingdom
Messages: 39
Registered: July 2009
Member
thanks for your replies.

we have a relatively small network - 42 computers. One domain
controller (which runs the usual server services plus just two (32-bit
only) business apps) and one Exchange member server. We really
wouldn't have the need (or funds) to warrant a third member server to
run apps.

Now that I know you can mix 32-bit and 64-bit I'm more clear on how I
want to do this.

My next issue is how to get Exchange 2007 configured on the member
server (sbs 2008) to link to active directory on the DC.

Previously when doing Exchange installs I've done domain prep etc and
installed Exchange from scratch. How do you do all this when Exchange
is already installed on SBS 2008? Bearing in mind that the SBS 2008
system won't be the domain controller?
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s [message #163785 is a reply to message #163784] Mon, 08 June 2009 05:06 Go to previous messageGo to next message
meiweb(nospam)  is currently offline meiweb(nospam)  Germany
Messages: 1307
Registered: July 2009
Senior Member
Hello eggedd2k,

You can not confiugre SBS as a member server, it MUST be Domain controller
in the domain holding all FSMO roles, thats by design in SBS OS version.
If i am correct it will stop working after 30 days when used in workgroup
mode without installing AD on it.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> thanks for your replies.
>
> we have a relatively small network - 42 computers. One domain
> controller (which runs the usual server services plus just two (32-bit
> only) business apps) and one Exchange member server. We really
> wouldn't have the need (or funds) to warrant a third member server to
> run apps.
>
> Now that I know you can mix 32-bit and 64-bit I'm more clear on how I
> want to do this.
>
> My next issue is how to get Exchange 2007 configured on the member
> server (sbs 2008) to link to active directory on the DC.
>
> Previously when doing Exchange installs I've done domain prep etc and
> installed Exchange from scratch. How do you do all this when Exchange
> is already installed on SBS 2008? Bearing in mind that the SBS 2008
> system won't be the domain controller?
>
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/ [message #163787 is a reply to message #163785] Mon, 08 June 2009 06:14 Go to previous messageGo to next message
eggedd2k  is currently offline eggedd2k  United Kingdom
Messages: 39
Registered: July 2009
Member
I had a feeling that would be the case.

In terms though of Exchange running on SBS 2008 as the domain
controller I thought it was best practice not to run Exchange on your
domain controller? I guess that's not the case with SBS?

An alternative would possibly be to have SBS 2008 (with Exchange) on
the DC and Server 2008 (32 bit) running on the second server.
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s [message #163802 is a reply to message #163787] Mon, 08 June 2009 09:29 Go to previous messageGo to next message
meiweb(nospam)  is currently offline meiweb(nospam)  Germany
Messages: 1307
Registered: July 2009
Senior Member
Hello eggedd2k,

SBS is a version especially made different from "normal" server OS versions.
Running Exchange on it is fine and supported configuration. As far as i know
you can also not remove exchange from it. Because of lots of differences
in SBS better choose another NG.

For questions belonging to SBS configuration i suggest that you use the SBS
newsgroup:
microsoft.public.windows.server.sbs

or

https://connect.microsoft.com/sbs08/community/discussion/ric hui/default.aspx

Your second option is ok.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> I had a feeling that would be the case.
>
> In terms though of Exchange running on SBS 2008 as the domain
> controller I thought it was best practice not to run Exchange on your
> domain controller? I guess that's not the case with SBS?
>
> An alternative would possibly be to have SBS 2008 (with Exchange) on
> the DC and Server 2008 (32 bit) running on the second server.
>
Re: Is it possible to run a domain controller on a 32-bit o/s and an Exchange server on a 64-bit o/s [message #163847 is a reply to message #163787] Mon, 08 June 2009 22:37 Go to previous message
lanwench  is currently offline lanwench  United States
Messages: 1684
Registered: July 2009
Senior Member
eggedd2k <chrisnrach17@aol.com> wrote:
> I had a feeling that would be the case.
>
> In terms though of Exchange running on SBS 2008 as the domain
> controller I thought it was best practice not to run Exchange on your
> domain controller? I guess that's not the case with SBS?

Correct.
>
> An alternative would possibly be to have SBS 2008 (with Exchange) on
> the DC and Server 2008 (32 bit) running on the second server.

That's what I'd recommend.

If you're migrating to SBS2008 you have to make sure your domain is
cleancleanclean and then create an answer file on a USB stick.
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