KB82808 is helpful if you are upgrading at the same time. KB87976 discusses using the disaster recovery snapshot feature. KPD26432 is the epo best practices guide and discusses using epo in a virtual environment. The product guide for epo also discusses transferring systems from one server to another if you already have a parallel server set up.
Thank you for your reply cdinet , i am able to add new server in our existing server and successfully transfer some clients and policies. Hopefully i can fully transfer all necessary datas in the new server...
additional info: both running in epo 5.3.2, old server 2012R2/ new server is in virtual 2016 epo 5.3.2