The web version of Word allows multi-user authoring but I remember that the client version would also allow that too from two or more clients or mix of client instances and Web instances. I haven't found anything that says that was discontinue nor can I find anything that says that is a feature and if so how do I use it?

Thanks

I think that you need to save the document to Microsoft's Windows Live OneDrive or a Sharepoint Server and then open the document from that location.

These links should give you more info
https://support.office.com/en-sg/art...d-f3d5372c27f4
http://news.microsoft.com/2010/04/16...the-same-time/

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Andrew Lockton
Chrysalis Design, Melbourne Australia