I have several users who access the same spreadsheets. Recently, I've had a
problem where a user will have 2 spreadsheets open at the same time and they
will accidently some how overwrite one of the spreadsheets with the content
of the other spreadsheet that is open. Is their a way to make the "Save As"
feature unavailable for these spreadsheets?

For example they have a spreadsheet "phonelist" and a spreadsheet "Daily
Staffing", both are open at the same time. Some how the contents of
"phonelist" replaces the contents of "Daily staffing" and the orignal
contents of "Daily Staffing" are gone. I am guessing they are doing a "Save
As" but I am not sure.

Any suggestion on how to keep this from happening would be greatly appricated.

Sincerely,
Susan