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Installing Exchange 2007 on Windows Server 2008What you need to know about installing Exchange 2007 on Windows Server 2008.

Published: Nov 15, 2007

Updated: Nov 15, 2007

Section: Migration & Deployment

Author: Nathan Winters

In this article I will cover the installation of Exchange 2007 SP1 on Windows Server 2008. I will lay out which

versions of Exchange are supported on which OS version and also which domain controller version they can use. I

will detail the supported methods to move from Exchange 2007 on Window Server 2003, to Exchange 2007 on

Windows Server 2008 and finally I will cover the prerequisites needed, before showing the actual install.

Note:

At this time, neither Windows Server 2008 nor Exchange Server 2007 SP1 have released to manufacturing. As I am

therefore working with beta code, certain elements of what follows (in particular the screenshots, may change

before the final version.

IntroductionIt is nearly a year after the release of Exchange 2007 and many of us now have complete Exchange 2007implementations. I guess that means we are looking for something new to do! If this is the case then you wont be

disappointed, as very soon we will be presented with the new challenge of moving our existing Exchange 2007

systems onto Windows Server 2008.

Table 1 lists the various supported scenarios for Exchange and OS versions.

Exchange Version Server OS Supported for Installation

Exchange 2003 Windows 2000 Server SP4

Windows Server 2003 (All SP levels and R2)

Exchange 2007 RTM Windows Server 2003 SP1 + SP2 (inc R2)

Exchange 2007 SP1 Windows Server 2003 SP1 + SP2 (inc R2)Windows Server 2008 RTM

Table 1: Exchange/OS versions supported for install

The first thing to note is that Exchange 2007 RTM is not supported on Windows Server 2008. To install Exchange

2007 on Server 2008 you must run Exchange 2007 SP1. This service pack, as many of you may know, is a little

different from previous service packs in that it is a complete installation of Exchange. Effectively SP1 is RTM with

the SP1 code slipstreamed into it. Having established that Exchange 2007 SP1 is required to install on Server 2008,

what other considerations are there?

Probably the biggest consideration is Active Directory. Table 2 sets out the different Domain Controller versions

supported by different versions of Exchange.

Exchange Version Domain Controller OS Supported

Exchange 2003 Windows 2000 Server SP4

Windows Server 2003 (All SP levels and R2)

Windows Server 2008 RTM

Exchange 2007 RTM Windows Server 2003 SP1 + SP2 (inc R2)

Windows Server 2008 RTM

Exchange 2007 SP1 Windows Server 2003 SP1 + SP2 (inc R2)

Windows Server 2008 RTM

Table 2: The Exchange/Domain Controller support matrix

One new Active Directory feature of Windows Server 2008 which I havent mentioned is Read Only Domain

Controllers (RODC) (and Global Catalog servers). These are servers which do not hold a writable copy of the AD and

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also do not hold account passwords. They are most likely to be used in branch office scenarios to prevent security

breaches either intentional or accidental. So how do these RODCs affect Exchange? Simply put, Exchange doesnt

use them! When left to automatically associate with a domain controller (or global catalog server) Exchange will

ignore the RODC or ROGC. The important thing for administrators to remember is not to manually set Exchange to

work with a RODC as things simply will not work correctly.

One other area that will be welcome to administrators is that with the release of Exchange 2007 SP1, the Exchange

Management Console will finally be supported on Windows Vista, and for that matter on Server 2008 as well.

Before moving on to how we upgrade, I think it is worth clarifying that Exchange 2007 SP1 will not install on

Windows Server 2008 Server Core. Server Core, for those who havent heard, is a cut down version of Windows

Server 2008 which only presents a command line interface. It has been stripped down to run various server rolesincluding amongst others Domain Controller, DHCP, DNS, File and Print. However, because a lot of functionality

has been stripped out to ensure a small footprint and less need for patching, important components such as

the .Net Framework are not present to support Exchange.

Note:

As I mentioned we are currently working with beta code. It is because of this that the Unified Messaging role does

not currently install on Server 2008. This will be rectified before release.

The upgrade pathSo how do you actually get from Exchange 2007 running on Windows Server 2003 to Exchange 2007 SP1 running

on Windows Server 2008?

Unfortunately, although understandably given the massive architecture changes involved, you cannot simply

upgrade Exchange 2007 to Exchange 2007 SP1 and then upgrade the OS to Windows Server 2008. This simply

breaks Exchange completely!Even when you have a clustered mailbox server, you cannot perform a rolling upgrade by upgrading one node of

the cluster failing over and then doing the other node.

The only way is to perform a migration! In other words you must do a clean install of Windows Server 2008 on a

new server and then migrate your data. Mailboxes can be moved using the Move-Mailbox cmdlet and public folder

data must be replicated.

This has caused a fair amount of discontent on various online forums but it is the only way!

Installation

.Net Framework v2.0 or 3.0

PowerShell RTM

MMC 3.0 (installed by default)

IIS 7 (Various components needed by different roles)

Having looked at all the background, lets get started with the installation. The first thing to cover is preparing your

Windows Server 2008 machine for Exchange 2007. There are a bunch of prerequisites which must be met as listed

below:

For a much more detailed look at the requirements for each Exchange server role see Exchange 2007 System

Requirements.

For now we are going to install an Exchange 2007 SP1 server in a new domain and new organisation. We will install

the CAS, HT and Mailbox roles. In order to install the prerequisites we will run the following commands one after

the other at a command prompt:

ServerManagerCmd -i RSAT-ADDS

ServerManagerCmd -i PowerShell

ServerManagerCmd -i Web-Server

ServerManagerCmd -i Web-ISAPI-Ext

ServerManagerCmd -i Web-MetabaseServerManagerCmd -i Web-Lgcy-Mgmt-Console

ServerManagerCmd -i Web-Basic-Auth

ServerManagerCmd -i Web-Digest-Auth

ServerManagerCmd -i Web-Windows-Auth

ServerManagerCmd -i Web-Dyn-Compression

After the first command (RSAT-ADDS) you will need to reboot as shown in Figure 1.

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Figure 1: Installing Active Directory Management Tools and being prompted to reboot

After the reboot, I used a simple batch file to run the other commands in sequence. Part of the output from the

commands is shown in Figure 2.

Figure 2: Part of the output from the prerequisite installation

For more detailed information about the Windows Server 2008 roles/features required for the other Exchange

2007 roles (Edge Transport Server and Unified Messaging Server) see How to Install Exchange 2007 SP1

Prerequisites on Windows Server 2008.

Having successfully completed the installation of prerequisites, it is time to install Exchange. Start setup and click

Install Microsoft Exchange Server 2007 SP1 as shown in Figure 3.

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Figure 3: Starting Setup of Exchange Server 2007 SP1

Next run through the usual setup steps as shown in Figures 4 11.

Figure 4: The SP1 Setup introduction screen

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Figure 5: Accepting the license agreement

Figure 6: Opting into the Microsoft Error Reporting scheme

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Figure 7: Selecting a typical install which installs CAS, HT, Mailbox roles and the management tools

Figure 8: Setting the new Exchange Organisation name

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Figure 9: Opting not to create public folders for legacy clients

Figure 10: Exchange Readiness checks in progress

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Figure 11: The not for production use warning before install about using a 32 bit version of Exchange 2007

Having completed the steps in Figures 3-11 installation begins. However, it is at this point that an error occurs as

shown in Figure 12. It would appear that for whatever reason, the registry key HKLM\SOFTWARE\Microsoft

\Windows\Windows Error Reporting\Consent does not exist!

Figure 12: The registry key doesnt exist error message

Note:

It is highly unlikely that this problem will still exist once the products ship.

To rectify this problem locate the relevant area in the registry and create the required key as shown in Figure 13.

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Figure 13: The newly created registry key

Having resolved the problem with the registry key you are left with no other option than to exit setup. On doing

this you will be prompted to reboot, which you should do.

When the server is backed up, restart setup which will start in Exchange Maintenance Mode as shown in Figure 14.

Figure 14: Exchange setup restarting in Maintenance Mode

At this point, step through the remaining setup screens as shown in Figures 15-17.

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Figure 15: Selecting the relevant roles for installation

Figure 16: Again making the choice not to create public folders for legacy clients

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Figure 17: Setup completed!

Once setup completes you will have a working Exchange 2007 SP1 install on Windows Server 2008 as shown in

Figure 18.

Figure 18: Exchange 2007 SP1 installed on Windows Server 2008

Before completing this article I thought it might be interesting to show the registry key that we created earlier. As

can be seen in Figure 19, it is now populated with various values.

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Figure 19: The values in the registry key created to solve the installation error

SummaryAs you can see from the steps above, the install process to put Exchange 2007 on Windows Server 2008 is basically

very simple. At this time there is the odd glitch but there is no doubt these will be ironed out before Release to

Manufacturing. I feel the only thing that has the potential to cause a delay in deployment are the usual worries

about deploying a brand new OS and the fact that if you already have Exchange 2007 on Server 2003 you will have

to perform a migration which requires extra hardware.

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