In reply to Jeff Marusak.

thanks Jeff,
Yes we have tested the cloud service integration feature. The trial tenancy we had did not allow integration with OneDrive (platform we use) for some reason. SharePoint integration worked however, if you post a SharePoint document link into a Space for collaborate with team. It appears as a link in Chat history only not stored centrally. After a period of time the Chat windows fills up and the link to the SharePoint document you posted earlier is lost in the Chat history.
Would be good to save this SharePoint document link in the Files section so its easily accessible when needed.