Windows 2003 Server neu aufgesetzt und jetzt fehlen die Exchange Einstllmöglichkeiten im AD

ah guck:

http://technet.microsoft.com/en-us/library/bb123643%28EXCHG.65%29.aspx

Running Exchange Server 2003 ForestPrep

Exchange Server 2003 ForestPrep extends the Active Directory schema to include Exchange-specific classes and attributes. ForestPrep also creates the container object for the Exchange organization in Active Directory. The schema extensions supplied with Exchange Server 2003 are a superset of those supplied with Exchange 2000 Server. Even if you have run Exchange 2000 ForestPrep, you must run Exchange Server 2003 ForestPrep again. For information about the schema changes between Exchange 2000 and Exchange Server 2003, see "Exchange Server 2003 Schema Changes" in the guide What's New in Exchange Server 2003 (http://go.microsoft.com/fwlink/?LinkId=47591).

In the domain where the schema master resides, run ForestPrep. (By default, the schema master runs on the first Windows domain controller installed in a forest.) Exchange Setup verifies that you are running ForestPrep in the correct domain. If you are not in the correct domain, Setup informs you which domain contains the schema master. For information about how to determine which of your domain controllers is the schema master, see Windows 2000 or Windows Server 2003 Help.

The account you use to run ForestPrep must be a member of the Enterprise Administrator and the Schema Administrator groups. While you are running ForestPrep, you designate an account or group that has Exchange Full Administrator permissions to the organization object. This account or group has the authority to install and manage Exchange Server 2003 throughout the forest. This account or group also has the authority to delegate additional Exchange Full Administrator permissions after the first server is installed.
Bb123643.note(en-us,EXCHG.65).gifImportant:
When you delegates Exchange roles to a security group, it is recommend that you use Global or Universal security groups and not Domain Local security groups. Although Domain Local security groups can work, they are limited in scope to their own domain. In many scenarios, Exchange Setup needs to authenticate to other domains during the installation. Exchange Setup may fail in this case because of a lack of permissions to your external domains.
Bb123643.note(en-us,EXCHG.65).gifNote:
To decrease replication time, it is recommended that you run Exchange Server 2003 ForestPrep on a domain controller in your root domain.

For detailed steps about how to run ForestPrep for Exchange Server 2003, see How to Run Exchange Server 2003 ForestPrep.