I solved the problem, the solution is include the source interface on DHCP relay configuration. This and "server-override" in conjuction solved the problem. I am not created a loopback interface like examples on documentation. I just put the source interface from the same vlan where I setup DHCP relay and worked fine.    Thanks!!!
Hi!   There is someone that configured the DHCP relay over OS10? I look at the documents, and I can't find any examples of configuration to help me understand well. I tried the configuration with "ip helper-address" and "ip dhcp-relay server-override", but with no success! Thanks!
DHCP Relay with VRRP OS10