Dns Client Enable Dynamic Update group policy

The following illustrates enabling DynamicUpdate of DNS registration records from DNS clients in windows 2003 and windows 2008.

1. Open group policy, using the command gpedit.msc.
2. In the console tree, expand to the node Computer Configuration -> Administrative Templates -> Network -> DNS Client and right click on "DynamicUpdate" parameter in DNS Client Node and select "Properties"

3. In the DNS Client DynamicUpdate properties dialog select "Enabled" button and click apply and then finally click ok.

To enable this policy on command prompt, then follow the link Enable Dynamic Update on command line.