As far as I know, when using Excel in a network environment, only one person
can edit a single spreadsheet at a time (while others can simultaneously read
it). Yesterday, someone on a conference call said that there WAS a way to
have multiple users edit a single spreadsheet at a time, but they did not
provide any details as to how to do it. Does anyone know if that's true?
Does SharePoint provide that capability?

Any help in resolving this debate once and for all would be greatly
appreciated.

Thanks,
Bob