Log in to Instant Messenger.
If you are using legacy SSL, access imssl.html or imssl.jnlp from your web browser. If you are using TLS, access the client normally. See Invoking Instant Messenger for information.
Instant Messenger will always use TLS if it is available and if the multiplexor is not set up for legacy SSL.
On the Instant Messenger Main Window, ensure the lock icon is visible.
The lock icon appears on the bottom right corner of the Main Window when Instant Messenger is using a secured transport, either SSL or TLS.