In our office we have 10 copies of Acrobat Standard DC and 1 copy of Pro DC. The pro user likes to highlight in black when redacting and for some reason this setting appears to copy across to all of my other users. The way I was able to identify that it was the Pro user is because his name also appears as the author when using the highlighter. I have disabled the sync preferences check box on all users, but the issue persists. Any help would be greatly appreciated.