our customers are using the Layer2 Cloud Connector to start Nintex Workflows in Office 365 on external (maybe local) data change or to make use of Nintex Forms with external data. The Cloud Connector simply syncs external data changes in 100+ supported systems and apps (as inserts / updates / deletes) to SharePoint lists. Lists are working great with Nintex. No changes in the connected systems required. The Cloud Connector runs locally (or cloud-based) as a Windows Service. Using this tool you can simply do more with Nintex!