I am trying to configure the Assign a Task action in an O365 workflow. In the Task Actions section, I select the 'Use existing predefined content type' option but only the Workflow Task (SharePoint 2013) content type is available. I would like to use the Nintex Workflow Task using Nintex Forms but it is not available. Is this feature possible in Nintex WF for O365? I have verified that the content types are correct...well as far as I can tell.