Before installing Exchange Server 2007, you must first evaluate the type of hardware that is available. The hardware and directory requirements of Exchange 2007 are outlined in the following table:
| Architecture | Exchange Server 2007 supports only 64-bit processors in a production environment. This change increases the total amount of memory that can be used by Exchange. Supported processors are:
- Intel processors that support Intel Extended Memory 64 Technology (for example Intel Xeon or Intel Opteron processors).
- AMD processors that support AMD64 (for example AMD Athlon processors).
You should be aware of the following information concerning processors:
- You must choose a processor that works with the x64-based version of Windows Server 2003.
- Because Intel Itanium processors cannot be used with x64-based versions of Windows Server 2003, they cannot be used with Exchange 2007.
- Exchange Server 2007 shows significant performance benefits when employing dual-core processors.
- A 32-bit version of Exchange is available, but is only supported in testing and training environments.
- Management tools can be installed on 32-bit processors in production environments. To do this, you must download the 32-bit version of Exchange 2007.
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| Operating system | You can install Exchange Server 2007 on the following operating systems:
- x64-bit Windows Server 2003 SP1 or later.
- 64-bit versions of Windows Server 2008 is supported beginning with Exchange 2007 SP1.
- 32-bit versions of Windows Server 2003 are supported only in testing and training environments (and only with the 32-bit version of Exchange).
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| RAM | The minimum RAM requirement to support Exchange 2007 is 2 GB per server. Depending upon the server role being installed, the recommended RAM is:
- Edge Transport server: 2 GB minimum or 1 GB per core (whichever is higher), with a maximum of 16 GB per server.
- Hub Transport server: 2 GB minimum or 1 GB per core (whichever is higher), with a maximum of 16 GB per server.
- Client Access server: 2 GB minimum or 1 GB per core (whichever is higher), with a maximum of 8 GB per server.
- Unified Messaging server: 2 GB minimum or 1 GB per core (whichever is higher), with a maximum of 4 GB per server.
- Mailbox server: Recommended 2 GB minimum, with an additional 2-5 MB per mailbox, with a maximum of 32 GB per server.
- Multi Role (Hub, CAS, UM, Mailbox): Recommended 4 GB minimum, with an additional 2-5 MB per mailbox, with a maximum of 8-32 GB per server (depending on the combination of roles installed).
You should know the following about selecting memory for your Exchange 2007 server:
- 32 GB is not a physical limitation; rather, it is currently the most cost-efficient memory configuration.
- The major advantage of having large amounts of RAM on a server is that it significantly lessens the workload of the disk subsystem.
- The disadvantage of implementing larger RAM is the cost of the RAM and installation is high compared to the amount of performance gained.
- Depending on the system, you might need to choose slower memory in order to get up to the maximum supported memory. Installing more memory might require using slower RAM.
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| Free disk space | An Exchange Server 2007 installation requires:
- At least 1.2 GB of available disk space for the installation.
- 200 MB of available disk space on the system drive.
- An additional 500 MB of disk space for each Unified Messaging (UM) language pack you install.
- On Hub Transport and Edge Transport servers, 4 GB of space for message queues. (This requirement has been reduced to 500 MB on Exchange 2007 SP1.)
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| File System | To install Exchange 2007, the following disk partitions should be formatted as NTFS:
- System partition
- Partitions containing database files
- Partitions that store Exchange binary files
- Partitions containing storage group files, including transaction log files
- Partitions containing other Exchange files
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| Disk subsystem | The disk subsystem must have enough storage capacity to support the I/O operations of the server and also support the amount of mailbox space allotted to each user. Exchange server 2007 supports:
- Locally-attached storage
- Storage Area Networks (implementation of Fibre Channel technology is ideal)
- IP SCSI Network-Attached Storage technology.
Be aware of the following when designing disk use for Exchange 2007:
- Although you can install Exchange 2007 on a single disk, for maximum performance you should use different disks for system files, database files, and transaction log files.
- Because of the increase in RAM in Exchange 2007, you can have a smaller number of large disks without seeing a decrease in performance.
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| Additional requirements | A system must meet the following additional requirements to install Exchange 2007:
- A local- or network-accessible DVD-ROM drive.
- Screen resolution set to 800 x 600 pixels or higher.
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Before installing Exchange 2007, the following components are required for all server roles:
- .NET Framework 2.0
- PowerShell 1.0
- Microsoft Management Console 3.0
- All necessary hotfixes
Note: If you use the Setup wizard in the graphical installation, these components (except for the hotfixes) will be added automatically.
Once the common criteria is in place, you must install the individual required components of whichever server roles you install:
| Mailbox server | A Mailbox server requires the following components:
- Internet Information Services (IIS)
- Enable network COM+ access in IIS
- World Wide Web Publishing Service (W3SVC)
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| Unified messaging server | A Unified Messaging server requires the installation of:
- The Microsoft Speech Engine service
- The Windows Media Audio Voice Codec
- The Windows Media Encoder
- Microsoft Core XML Services (MSXML) Version 6.0
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| Client Access server | The Client Access server requires:
- World Wide Web Publishing Service (W3SVC)
- RPC/HTTP proxy Windows networking component on any computer that provides Microsoft Outlook Anywhere access (recommended one per site)
- ASP.NET version 2.0
- Distributed Transaction Coordinator Service
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| Edge Transport server | An Edge Transport server requires the Active Directory Application Mode (ADAM) to be installed before the Edge Transport server can be installed. It is best to accept all of the default settings during the ADAM installation. Note: If you are installing Exchange 2007 SP1, install Active Directory Lightweight Directory Services (AD LDS) instead. |
Note: When installing an Exchange server role in Exchange 2007, it is not necessary to install the SMTP or the NNTP components before installation is initiated, as was the case in Exchange 2003. If you install the Hub Transport server role or the Edge Transport server role on a machine, it
cannot have the SMTP service or the NNTP services installed on it. In addition, the NWLink IPX/SPX/NetBIOS Compatible Transport Protocol must not be installed on any Exchange server.
Client computers or mobile devices must have the following installed to run certain applications:
| Outlook | To use Microsoft Outlook to access an Exchange 2007 mailbox, you must have one of the following versions of Outlook installed on the client's computer:
- Outlook 2002
- Outlook 2003
- Office Outlook 2007
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| Outlook Web Access | The client computer must have a Web browser installed. Microsoft Internet Explorer must be installed if Integrated Windows authentication is employed. |
| Mailbox access for mobile devices | For mobile devices access to mailboxes requires the following:
- Windows Mobile 2003 Second Edition
- Windows Mobile 5.0 with the Messaging and Security Feature Pack (MSFP)
- A non-Windows operating system that are compatible with Exchange ActiveSync
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