If you want to change the protocol TLS 1.0 to TLS 1.2, you need to change the value of SSL_Cipher_List in Agent.ini.
This change can work for the Register function, but not for the Test Connection function.
ServerProtect for Microsoft Windows/Novell NetWareAll
The Test Connection function still uses the Transport Layer Security (TLS) 1.0 default setting to do the action with Control Manager (TMCM) in the CMAgent Setting page. Use https to do this test if you want to disable TLS 1.0 and only enable TLS 1.2.