Uninstall Workflow Manager silently
Available with Workflow Manager license.
Use the msiexec.exe command to silently uninstall ArcGIS Workflow Manager Server.
Open a command prompt.
Run the following command to uninstall Workflow Manager Server:
msiexec /x {CF66FDBC-FBF0-4593-8222-172328452A77} /qb
The silent uninstall process is not available for Linux implementations of ArcGIS Workflow Manager Server.