Skype for Business Server has brought in limited connectivity between on-premise hybrid deployments and their Skype Online counterparts via the Skype for Business Control Panel.
Now, on the home screen you have the option to log into Office 365, in Lync integration to Office 365 was via powershell only.
When you click sign in, you get prompted for username and password, which I like as Office 365 admin accounts may not be linked to on-premise accounts for single sign-on
And then you get confirmation
You can change the account you’ve signed into if need be
Setting up Skype Hybrid is now possible from the control panel
Now, my Lync 2013 deployment was already configured for Hybrid so all the checks passed, hopefully I’ll get screenshots from a new hybrid and will be able to update this