So I have installed the Anniversary Update (Windows 10 Pro - not domain joined).
Before the update i had it configured to prompt to schedule a restart after updates (Rather than automatically). That option is now gone leaving two other settings: Active Time and Custom Restart Time.
It won't allow you to set your Active Time to anything more than 12 hours, which is no good as that leave a huge 12 hour Window when it might restart.
Custom Restart Time seems like an acceptable option, except it is greyed out and I can't enable it.
Has anyone else found that the Custom Restart Time options are greyed out on Window 10 Pro Anniversary Update? If so, have you found how to fix it?