Help! Missing ntfrs registry keys on both DCs

Hello, i have two 2008 R2 domain controllers in my network and a working exchange 2010 server.

Recently i realised i have some issues with netlogon replication and in process of trying to solve it i decided to make a sysvol restoration. So i stopped service, opened regedit and was going to change needed registry key at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NtFrs\Parameters\Backup/Restore\Process atStartup but there is no such keys on my servers the only thing i have there isHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NtFrs\Parameters\sysvol

I checked secondary domain controller and there is no such keys either, as i understand it is a major issue and i have no idea how to solve it..can someone please help me?