Exchange 2013 CAS WNLB and DAG on existing single CAS and Mailbox

Hi,

Exchange 2013 single CAS and Single Mailbox server is running in virtualization in Hyper-V. I am planning to install another instance of CAS server on VM and configure WNLB and same for Mailbox instance on VM and create DAG server.

Kindly guide that it is possible to install and configure WNLB service on existing CAS and same allow create DAG on existing Mailbox server.

Thanks