I'm a little late to the game here but i've read most of this thread about the file permission and files not opening problem. I just upgraded to both Sierra and Office 2016/365 on my Mac and cannot open anything - nothing in Word, Excel, or PPT. I updated
to the latest version of Office, 15.33, and can't get anything to open. I had been working in Office Mac 2008 and thought it was time to upgrade since those take forever to launch and thinking that was a mistake. I now have software I can't use and none of
the work-around solutions have resolved it. I run a design business, I don't have time to constantly be turning on and off, rooting through the library folders and everywhere else to resolve this - I have to get work done. It's May 2017, and there are STILL
problems almost 2 years later.
Are there any new solutions or am I just yelling into the wind? If so i'll contact Microsoft for a refund since I can't get anywhere with this.