Need Help for Maintain a Disaster Recovery Site for Onpremises on windows Azure.

Hi  All,

 In On premises I am having 2 Domain controllers  (Primary Dc & Additional Dc ).

For both Domain controllers need DR site On windows Azure. In this scenario, in case of failure in on-premises ,

1) All users should automatically  connect  the DR site from On-premises

2)From Off-premises by using VPN connection.

Please guide me how to achieve above scenario. Also Need prerequisite details for achieving above scenario.

Waiting for your response.

Thanks All.

Regards,

VA