Hi,
I have used a few sites to check and they tend to give different answers:
MX Toolbox, SSL Labs and CheckTLS.
I have a fully patched Windows 2012 R2, Latest Patches on Exchange 2013.
I have also followed this guide:
https://blogs.technet.microsoft.com/exchange/2018/01/26/exchange-server-tls-guidance-part-1-getting-ready-for-tls-1-2/
https://blogs.technet.microsoft.com/exchange/2015/07/27/exchange-tls-ssl-best-practices/
I am still getting problems and errors.