Many customers need to configure their ZMF tasks to communicate using Secure Sockets Layer (SSL) functionality. The only supported mechanism for SSL is to use IBM's Application Transparent Transport Layer Security (AT-TLS).
An example set of instructions covering one way in which this can be configured for a full ZMF REST services to Jenkins installation is available in KB article S143367.
Although that KB article specifically covers ZMF REST Services-Jenkins communication, the instructions can be adapted and used for any client's SSL communication to the ZMF started task (e.g. ZMF4ECL, ZDD, bespoke ZMF Web Service applications, etc.).