There are two places to put proxy details; in the advanced properties of the connection, or in the java start up parameters
Which method you use depends on whether the adapter is a "next gen" adapter or a "current gen" adapter.
Next gen adapters will use the advanced connection properties, whereas current gen will use the global proxy settings where your java startup parameters are set up.
Next gen adapters consist of the following as of January 2025:
For current gen you can set the proxy settings in the java options.
Use the following page for instructions on how to set those:
For next gen adapters, set the proxy settings in the advanced properties as shown below: