Hallo
Also...ich habe DNS installiert...beim DHCP habe ich eingestellt, dass die DNS Server IP an die einzelnen Clients mitgegeben werden soll(funktioniert auch). Nur funktioniert keine einzige Umwandlung.

Der Server kennt wohl nicht mal seinen eigenen Hostnamen...hmm...ich habe nur eine Forward Zone erstellt. Aber ja...an was könnte das nun wieder liegen?
Grüsse und Danke
Event Viewer (Warnings)...
The DNS server machine currently has no DNS domain name. Its DNS name is a single label hostname with no domain (example: "host" rather than "host.microsoft.com").
You might have forgotten to configure a primary DNS domain for the server computer. For more information, see either "DNS server log reference" or "To configure the primary DNS suffix for a client computer" in the online Help.
While the DNS server has only a single label name, all zones created will have default records (SOA and NS) created using only this single label name for the server's hostname. This can lead to incorrect and failed referrals when clients and other DNS servers use these records to locate this server by name.
To correct this problem:
1) open Control Panel
2) open System applet
3) select Computer Name tab
4) click the "Change" button and join the computer to a domain or workgroup; this name will be used as your DNS domain name
5) reboot to initialize with new domain name
After reboot, the DNS server will attempt to fix up default records, substituting new DNS name of this server, for old single label name. However, you should review to make sure zone's SOA and NS records now properly use correct domain name of this server.