Suddenly in the past few days one of our users has lost the ability to open PPT files. He's prompted with a Microsoft Upload Center message, which is on occasion in addition to a message saying "Access denied. Contact your system administrator." His is in an AD group that has, and always had, modify rights to those files.
This is for Office 2016 Standard on Windows 10 Pro.
--Renamed the
%userprofile%\AppData\Local\Microsoft\Office\16.0\OfficeFileCache folder and recreated it. Deleted the old one.
--Reinstalled Office 2016.
--Gave user explicit rights to entire folder structure containing the PPTs in question.
We're at a loss...can anyone assist? Thanks.

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