I have had to change my network subnet and server IPs. Was 172.16.x.x/16
to 172.21.x.x.

This looks OK but the image safe data keeps the DNS server IP - the old
one. Therefore new images on previously imaged pcs point to the wrong IP.

I can change with Ziswin but this is a pain with hundreds of PC's to do!
ie run Ziswin, edit, modify, tag just imaged, DSN, edit the dns server,
reboot etc. Does not always work and have to repeat on some pcs.

Can anyone tell me how to automate the change please.

thanks john