WFA provides REST and also SOAP APIs for workflow execution. Attaching a powershell script ( originally written by Mirko ) which can be used to execute WFA workflows from any Remote Windows host to execute workflows on the wfa server.
It has an interactive CLI session i.e. it lists all workflows for you, you select the workflow ID, its asks for parameters, you provide those, it executes it constantly providing the execution status.
Modify the username, password, and wfaserver variables as per your setup.
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