TABLE 1: Exchange 2003 Installation Permissions
Task Required Permissions or Roles
Run Forestprep Member of Enterprise Administrators group and Schema Administrators group and the local machine's Administrator group
Run Domainprep Member of Domain Administrators group and the local machine's Administrator group
Install the first server in a domain Member of Full Exchange Administrator at the organization level
Install additional servers in the domain Member of Full Exchange Administrator at the administrative-group level
Install an SRS-enabled server Member of Full Exchange Administrator at the organization level