Ipv4 suddenly changes to Ipv6

Hi there,
A strange thing is happening. I manual added a DNS record on my DC (Win2k8) for my Terminal Server Win2k8 and all seems to be working fine. But after a couple of hours it changes the Ipv4 address to Ipv6 and my server is no longer reachable. Not even
by pinging the Original Ipv4 address. When I delete the Ipv6 entry and manual add the Ipv4 one, it again changes after several hours.
How can it be that this happens automatically and why is this happening to only on server?
I cannot see anything in the eventviewer.
Please advice.

Hi,
Thanks for your posting in Windows Server Forum.
Firstly please try to turn off IPv6 on effected server and check whether it still shows the same result.
Also please check below article for detail.
*SOLVED* Suddenly no ipv4 address, only ipv6?!
Hope it helps!
Thanks,
Dharmesh

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Ipv4 suddenly changes to Ipv6

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