Windows 10 Version 1511 build 10586.164.
From a administrator's user account, when I open the properties of a folder and go to the advanced permissions, the "change permissions" button is gone; if I press the "view" button, I cannot change any permissions as they are grayed out.
Am I doing something wrong or has something changed in this build of Windows 10 from the way we use to change advanced permissions?
Nothing has changed, at least not since Windows 8.
The problem is that the permission entries you can't edit are inherited from the parent object.
Click the Disable inheritance button, then choose Convert inherited permissions into explicit permissions on this object.
And now you can edit them all:
Clicking Edit results in a useful Permission Entry dialog:
I imagine this worked in other places (or for other entries on the same object) because those weren't inherited. Access control entries can only be modified when the object in question hasn't inherited it from anywhere else.
DV7/User to be percise.