The time difference between DHCP server %1!s! and DHCP server %2!s! is greater than the permissible value of %3!d! seconds. ...

The time difference between DHCP server %1!s! and DHCP server %2!s! is greater than the permissible value of %3!d! seconds. Ensure that both servers are time synchronized before configuring failover. You could set up Windows Time Service on both servers to ensure time synchronization.