We have community server and document server installed.
There were a number of times when a few of the spreadsheets and documents we've been editing for quite some time just suddenly goes back to a blank page.
2. Share to other users.
3. Users use and edit on this sheet.
4. After ~8 days of use, the first thing we see in the morning is a blank version of that spreadsheet with NO revision history.
a. Randomly on spreadsheets and documents.
b. ~5 shared documents, ~3 in common documents, ~1 personal document (not shared)
c. Number of days being used before going blank is random as well.
d. Daily back-up is inconvenient as we have more than 30 documents being used regularly,