A family of Microsoft word processing software products for creating web, email, and print documents.
I manage about four dozen Macs and we are having widespread occurrences of this issue. It's not every computer, but it is many of them. The issue comes and goes, but can always be fixed by restarting word or excel. However, if someone has several documents open, none of them can be saved. This is resulting in lost work, or really weird workarounds to email documents to themselves. It is a major headache for us.