How to point client to new SEPM server from different Domain

Hi Guys,

I have 60 Linux & Windows servers runnning in Domain A and i want to install symantec and point my client to get updates from SEPM server in Domain B, Can you advise on this

I verified i can  ping Domain B's SEPM & Live update servers from Domain A. But no Name resolution

Do i need to create a A record in  Domain A ? is it enough ?  Please advise

Thanks,

Rajesh