If ALL is specified, what method will be used?
[SSL_METHOD]
INITIATE_SIDE = all
RECEIVE_SIDE = all
Note that XCOM supports the TLSv1.2, TLSv1.1, TLSv1.0, and SSLv3 protocols.
XCOM™ Data Transport® for Windows
SSL will choose the highest level available for both systems. For example, if the sending system supports TLS v1.2 and the receiving system only supports TLS v1.1, SSL will choose TLS v1.1.