TLS 1.2 Implementation Validation

I have a validation question regarding implementation of TLS 1.2. What tools, scripts, processes, etc.. can be used to validate that TLS 1.2 is working when clients, webserver, and SQL Servers are communicating between each other? Do I need to perform network packet sniffing, run traces, use process explorer? Is there a verbose option somewhere that can be turned on with logs reviewed? Note: if it makes a difference, the SQL Servers involved run a variety of versions: 2008R2, 2012, and 2014.