We have terminated the support for earlier TLS versions (TLS 1.0 and TLS 1.1) and have completely migrated to TLS version 1.2. 

For the Windows Server Monitoring agent, TLS 1.2 is disabled by default for Windows 2008. To enable it, please try this work-around mentioned in this article. To enable the same for versions 2012, 2008 R2, and 7, apply the hotfix mentioned in this article.