This section outlines the schema changes that have been added to Microsoft® Exchange Server 2003 since Exchange 2000 Server.

The Classes Modified by Exchange section contains the modifications that are made to Microsoft Active Directory® classes when you install Exchange Server 2003.

The Attributes Modified by Exchange section contains the modifications that are made to Active Directory attibutes when you install Exchange Server 2003.

The Classes Added by Exchange section contains the classes that are added to Active Directory when Exchange Server 2003 is installed.

The Attributes Added by Exchange section contains the attributes that are added to Active Directory when Exchange Server 2003 is installed.

The Modifications to Exchange Classes and Attributes section contains the modifications that are made to existing Exchange 2000 Server classes and attributes when you install Exchange Server 2003.