Oh I see,
The window looks so similar to other activation windows, I had only ever seen the DPS login for CS5 which was in the Panel.
Be good for this window to have some text that relates to DPS. Maybe Sign in to DPS or you must sign in with an Adobe ID to use the Digital Publishing Suite and the Folio Builder.
As it was prompting when InDesign was being launched this led me down the incorrect path.
Thanks