i have granted all the required permission:
Registry Read permission
Full access to HKLM\CurrentControlSet\Services\DHCPServer\Performance key and all subkeys
Event log Read permission
Member of the DHCP Users or DHCP Administrators group (located in local Security Accounts Manager (SAM)
or Active Directory Domain Services (AD DS) depending on whether the managed node is domain joined or not)
but still having the same issue
i managed to discovered the dhcp 2012R2 using dhcp 2008R2 mp
i not able to discover the dhcp 2012R2 using dhcp 2012/R2 mp