We are using K2 5.3 on premise with SharePoint 2016 on premise. K2 5.3 enviroment is an upgrade from K2 blackperal 4.7. We have not converted the workflows to new K2 Five workflow yet. All workflows are using the legacy worklfow engine.
I have not looked into the documentation in details but my question is, would legacy workflow support SharePoint online or do I have to convert all existing workflow to new workflow for using SharePoint online.
Appriecate any input.