I've typically lowered the TTL in the past. Kind of a belts and braces 
approach. 
 
I've typically done this by keeping both DNS servers online until I knew that 
all clients had been updated. Zone xfer works wonders. 
 
Once the clients are using the new server, give it until TTL has expired before 
sunsetting the original DNS server.
 
Al

________________________________

From: [EMAIL PROTECTED] on behalf of Tom Kern
Sent: Tue 8/16/2005 7:44 PM
To: activedirectory
Subject: [ActiveDir] dns migration



I'm moving my primary non-ad intergrated dns over to a different
server. the workstations will be getting the new dns via dhcp and the
servers will get it via a VBScript.
Is there anything else i should do to insure a smooth transition?
should I lower the ttl for the zonejust incase clients have changed
ip's via dhcp or anything else?
thanks
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