We have Microsoft Exchange Server 2010, and use SSL certificate from GoDaddy. Recently I was requested by our client to "enforce TLS" for the domain names they have, for encryption purposes. I have contacted GoDaddy, and explained what I needed to do, but they wanted to sell us more certificates, which does not seem correct. From what I learned so far, it is modification on our server settings with Transport layer. I have not been able to find an instruction that makes sense. Please advise.