Adobe Campaign now supports OAuth for authentication in the External API workflow activity. This new capability opens up the ability for this activity to communicate with systems requiring OAuth support.
For more information refer to the detailed documentation: External API
In case you have any questions, please feel free to post them below or reach out through the community Q and A section.
In case you have any ideas and/or suggestions regarding the Campaign Standard product, then kindly submit them here.
Sukrity Wadhwa