The Publish Online command was working fine just a few days ago, now it is missing from File menu and from the App Bar. The Dashboard command on the File menu is also vanished.
I just deleted prefs and restarted but the problem is still there.
Look under the Help menu and see if you see your log-in name. You may not be logged into your Adobe ID.
It may help to reboot your computer.
Steve, I was logged in, but in any case restarting the computer did the trick for me. Thanks!