Extended Support SEP 12 - LUA Server

Dear,

At the momment in my environment some Windows Xp and Windows 2003 are online and dont is possible to migrate to other version after the time of end support to SEP 12 ( Next 4/3/2019) and they going to buy a extend support .

My question about is , I have to update the sepm license and its all? or a have to make another change?

Additional , I am using a LUA Server to download the virus def, the lua still recieve the definition from Sep 12.x ?

Regards

Miguel Angel