Actually i didn't do any transferring or seizing operation even though the roles are transferred to ADC.
Suppose if that was done by somebody transferring or seizing how to track it down, and after seizing what happens if the old dc comes back in to online...because i got some solutions for resolving kerberos Event ID4 so if i do it in my old DC what will happen.
Group policies are not updating
in my case DC is in physical machine and ADC is in Hyper-V and previously PDC use to show in DC but when i perform net time form client it use to show ADC.