I am having an issue resolving external sub domain names. I have internal servers that wanted easliy resolved internally and externally. ex. terminal1.domain.com So I have a forward lookup zone called domain.com. I have this issue where my website is domain.com and we created a external subdomain called shop.domain.com. It is currently hosted on a service that isn't a static ip. I currently can't resolve it internally if I create a cname to shop.shopify.com. I have to assign it a static ip to make it resolve. What other options do I have to get this to work. I don't believe my ip static with shopify and I don't want management to one day tell me the shop.domain.com is down.