It is important to establish the naming conventions for your organization before you install and configure the system. The directory names for the organization, sites, and servers cannot be changed without reinstalling the software. You can change the display names at any time. For more information, see Microsoft Exchange Server Concepts and Planning.
Before running Microsoft Exchange Server Setup, you must create a Windows NT service account. A service account is a user account that Microsoft Exchange Server services (such as the system attendant and the directory) use to run. You should use the same service account for all Microsoft Exchange Server computers in a site.
To perform the following procedure, you must be logged on as a domain administrator.