I have this problem also, but with Trio Office. The file is located in C:\Program Files\WindowsApps, which, from what I've read, should not be able to get a virus file into it.
I can't even look at the file, or the quarantined file to see what the file size is. The file seems to get replaced automatically often since I've seen McAfee quarantine it multiple times in a short period, but sometimes it is not there when I need to use the app and I have to reinstall.
I can't exclude it from scanning since it's in an inaccessible folder. How can I keep it from being removed?