Office For Mac 2011 -Cannot Save Spreadsheet in Excel Problem

Ran into an issue on an install of Office for Mac 2011 recently. When the user attempted to save an excel spreadsheet, they would get an error as follows:
– file name or path name does not exist
– file is being used by another program
– name is the same as another file

Unfortunately these error messages were not the case- it was a new file with a unique name, and only Excel was trying to use the document.

The solution was simple to understand once the issue was fixed by verifying disc permissions. The user did not have the correct permissions to write files. Apparently saving an Excel document writes first to a temporary location which they had no rights.