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