Question : Test Exchange Server 2007

Hello - I have an existing network running Server 2003 Std. SP2 as a domain controller. I have a Fileserver with multiple server roles (DNS, DHCP and AD). I have a test server that is part of my current domain, however is not a domain controller. I'd like to install Exchange on this server and test features (shared calendar, ODA, shared task, emailing, etc...).

My concern is that when I do a install it gives me errors and I do not want to change anything that I will regret later wheather I get exchange project approved or not.

Is this the best practice to install a test exchange on an existing network?

Will it be easy to setup another server with exchange if we get this approved?
Note: I will be upgrading to a differant server/hardware to 64bit (Server 2003) and of course RAM and other requirements in order to satisfy Exchange 2007. The current test server is just for testing purposes. Again I just want to ensure that I can either recreate or transfer to a whole new server.

Below are the errors I'm getting while installing and my concern is if I change/modify existing network, again is this a smart move?
 
These are the errors I get and must change/fix in order to proceed with install.

 Summary: 4 item(s). 0 succeeded, 4 failed.
Elapsed time: 00:00:27


Organization Prerequisites
Failed

Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.

Error:
Active Directory domain 'DC=RAPA,DC=local' is in mixed mode. To install Exchange Server 2007, the domain functional level must be raised to Windows 2000 native mode or above.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=b88d3253-db66-4bc2-9423-65aff6b9f0a9

Error:
Active Directory root domain 'DC=RAPA,DC=local' is in mixed mode. To install Exchange Server 2007, this domain must be Windows 2000 native mode or above.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=b88d3253-db66-4bc2-9423-65aff6b9f0a9

Warning:
When you run Exchange Server 2007 Service Pack 1 (SP1) on Windows Server 2003 or earlier versions of the operating system, we recommend that you install Microsoft .NET Framework 2.0 Service Pack 1 (SP1). If you cannot install .NET Framework 2.0 SP1, install hotfix Microsoft Knowledge Base article 942027 from http://go.microsoft.com/fwlink/?linkid=101219.


Elapsed Time: 00:00:11


Hub Transport Role Prerequisites
Failed

Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.

Warning:
The 32-bit version of Exchange Server 2007 is not supported for production use.

Warning:
When you run Exchange Server 2007 Service Pack 1 (SP1) on Windows Server 2003 or earlier versions of the operating system, we recommend that you install Microsoft .NET Framework 2.0 Service Pack 1 (SP1). If you cannot install .NET Framework 2.0 SP1, install hotfix Microsoft Knowledge Base article 942027 from http://go.microsoft.com/fwlink/?linkid=101219.


Elapsed Time: 00:00:05


Client Access Role Prerequisites
Failed

Error:
Unable to read data from the Metabase. Ensure that Microsoft Internet Information Services is installed.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=a4a4d339-4009-4fb7-b842-ca2ba79f13f0

Error:
The World Wide Web (W3SVC) service is either disabled or not installed on this computer. You must exit Setup, install the required component, then restart the Setup process.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=9eeaa77f-4d46-4d9a-9c36-f262a075392b

Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.

Warning:
The 32-bit version of Exchange Server 2007 is not supported for production use.

Warning:
When you run Exchange Server 2007 Service Pack 1 (SP1) on Windows Server 2003 or earlier versions of the operating system, we recommend that you install Microsoft .NET Framework 2.0 Service Pack 1 (SP1). If you cannot install .NET Framework 2.0 SP1, install hotfix Microsoft Knowledge Base article 942027 from http://go.microsoft.com/fwlink/?linkid=101219.


Elapsed Time: 00:00:04


Mailbox Role Prerequisites
Failed

Error:
Unable to read data from the Metabase. Ensure that Microsoft Internet Information Services is installed.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=a4a4d339-4009-4fb7-b842-ca2ba79f13f0

Error:
The World Wide Web (W3SVC) service is either disabled or not installed on this computer. You must exit Setup, install the required component, then restart the Setup process.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=9eeaa77f-4d46-4d9a-9c36-f262a075392b

Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.

Warning:
The 32-bit version of Exchange Server 2007 is not supported for production use.

Warning:
When you run Exchange Server 2007 Service Pack 1 (SP1) on Windows Server 2003 or earlier versions of the operating system, we recommend that you install Microsoft .NET Framework 2.0 Service Pack 1 (SP1). If you cannot install .NET Framework 2.0 SP1, install hotfix Microsoft Knowledge Base article 942027 from http://go.microsoft.com/fwlink/?linkid=101219.


Elapsed Time: 00:00:05

Answer : Test Exchange Server 2007

>Is this the best practice to install a test exchange on an existing network?
What a question, NO
If you really plan installing a live server, it does not so much care as all AD related settings have to been made anyway. But I you decide against EX, you have also to clean the AD again.

>Will it be easy to setup another server with exchange if we get this approved?
Usally yes. All domain changes (AD, org name etc) can left as they are. To move exchange within a domain is quite easy. To move an exchange from one domain to another is effort. If you plan to take over the test server into production, it maybe easier to install it into an live domain, but more work, if you decide against it.

I would install exchange first into a test environment for the first decision step, just to see, if it meets your needs. If you decide, that you want to make a more detailed test, you can later install a second test server into the domain, to avoid the moving trouble.

Error: From my point of perspective, the only error you have to fix is:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
I rebooting do not help, there may be hanging something around from an earlier setup.

All the other items says, what is to do.