We are rolling out  Horizon  7.13 servers with Unified Access Gateway to handle connections from the untrusted Internet. These servers will be handling a mix of both internal and external users.  I have two questions. When using UAG and external clients, do I need to give the UAG & View servers SSL certificates from a public certificate authority  Or can I give the View servers certificates from our internal PKI while our UAG has certificate from a public certified authority