Change the default TTL for the DNS SRV records generated by a domain controller

Hi,

I'd like to knowhow to change the default TTL forthe DNS SRV records (10 minutes)generated by adomaincontroller (Windows 2008 R2).

I'vetried to change theTTLdirectly in the DNSSRV records but theTTLreturned tothe default value(10 minutes)after 1 hour.

I alsotried to change theTTL in the file "C:\Windows\System32\config\netlogon.dns", in a DNS server,but without success.

I alsotried to applythe registry key"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DefaultRegistrationTTL"but without success.

Thank you.