This article covers the steps to properly encrypt calls in Kerio Operator, which may be helpful when administrators want to encrypt calls for any extension as a security measure for such calls.
In the Kerio Operator administration interface, navigate to Configuration > Extensions.
Choose an extension and click Edit.
Go to the Advanced tab and check the Encrypt communication (TLS and SRTP) box, as shown below.
Kerio Operator encrypts all calls for the selected extension now.