I just test the Redundancy but not working as well as expected
all services run perfectly. When stoppping the DHCP service on SERVER1, DHCP service on SERVER2 come up put client doesn't take IP even I renew error message limited connectivity
I usung different version on MY SERVER box one is standard edition the other is Enterprise.
can you help please

You must configure your router to send DHCP-requests also to SERVER2.
It's called something like DHCP-relaying or UDP-forwarding depending on the brand of your router