I have downloaded and installed Office 365 Home Premium (for Mac, so it's Office for Mac 2011). The software seemed to install OK. I then tried to activate the software - either directly through the Microsoft Office Setup Assistant.app, or by opening Word (which then comes up with exactly the same screen as the Setup Assistant). I select the 'Sign in to an existing Office 365 subscription' option. On the next page, when it asks for my sign-in email address (see screenshot below with my email address removed for privacy), when I type in my email address and click 'Next', absolutely nothing happens.
Activation for Microsoft Office for Mac 2016. There is no way to skip the sign in as the licence is on a individual basic binding to your MS account. David Johnson, CD, MVP Owner Commented: 2017-02-13. It depends upon the licensing model of the product. Full retail product has a product key.
I tried hitting Return on the keyboard; that does nothing either. I simply cannot progress from this screen that asks for my email address!!!! I know the Next button works, because when I click it without entering an email address, it says 'Please enter a valid email address'. My install is not showing up in My Account (Office.com), i.e. It claims I still have 5 out of 5 installs remaining. I've tried re-downloading and re-installing. That doesn't fix the problem.

Other info: - I'm running OS X Mountain Lion - I signed up to the 30-day trial of Office 365 Home Premium - I haven't uninstalled Office for Mac 2008 from my computer - but according to the thread, that shouldn't matter.