Mcafee epo to Symantec Migration

Dear All,

I am planning to migrate from Mcafee Epo to Symantec Endpoint 12.1.4112 ( as i need to keep this version to maintain parent compant standards)

we have 500 Windows servers & 3500 servers connected in 2 different domain ( no trust) enabled isolated each other

Kindly guide me how to prepare for this mcafee epo to symantec migration, first task is migrate only windows servers

Thanks,

Rajesh