Currently testing instalation of InDesign 2015 and trying to access the 'Publish On-line' feature.
It does not appear to be active - see the embeded screen shot. I have not made the instalation our IT department has.
It appears that the Creative Cloud Application is not installed - is this required to activate this functionality?
Looking forward to your response.
The Publish Online Feature has to be activated in the Preferences in InDesidng CC > Preferences > Technology Previews…
But be aware that at the moment not every license has it included. It is not included eg in Volume Licenses as company often have.