Upgrading Microsoft Exchange Server

Setup checks for any Microsoft Exchange Server components installed on your computer. You can determine the version of a Microsoft Exchange Server installation by viewing the properties on the server object in the Administrator window.

To upgrade an existing KM server installation, see "Upgrading an Existing KM Server Installation" earlier in this chapter.

Note   Before upgrading a Microsoft Exchange Server computer, turn off all server monitors that include the computer on which Setup is being run. Alternatively, you can use the monitor's Maintenance Status property page to put the monitor into maintenance mode. For more information, see Microsoft Exchange Server Maintenance and Troubleshooting.

Time Required to Upgrade

Setup estimates the time required to upgrade your existing information store. The upgrade process may take a long time, depending on the size of your information store. For very large information stores, this process can take more than a day. If the estimated time to upgrade is too long, you can quit Setup.

When you install Microsoft Exchange Server, you can choose either Standard Database Upgrade or Fault-Tolerant Upgrade. Neither option performs a complete backup of your existing databases. You should perform a full backup of your information store before running Setup.

Standard Upgrade   Upgrades your databases in their current locations. If Setup fails during this operation, the databases must be restored before you can return to your previous installation or run Setup again.

Fault-Tolerant Upgrade   Backs up each database to a different, temporary location before upgrading. If Setup fails, this upgrade significantly reduces the risk of having to restore your databases. Instead, you can reboot your computer and run Setup again. After all databases are successfully upgraded, the backup databases are removed and replaced by the upgraded databases. If Setup fails during this operation, you must restore your databases before you can return to your previous installation, or run Setup again. The alternate location for a fault-tolerant upgrade must have available space at least twice the size of your information store and cannot be a network drive.

Note   If you are upgrading from Microsoft Exchange Server version 4.0, fault-tolerant upgrade is not available. To perform a fault-tolerant upgrade you must first upgrade to Microsoft Exchange Server version 5.0.