I have a few users who are having an issue with Excel spreadsheets. They mainly deal with spreadsheets from Cisco, such as the pricing tools which only use .xls not xlsx. They are all running in compatibility mode as Cisco doesn't accept .xlsx on their site. do not believe they are running macro's.
At random times, these users will experience all of their Excel spreadsheets going black that are open. Not that the cells are being formatted differently, but as if Excel has crashed or is just not able to display the data. If we close them through task manager, they reopen and look fine.
We have not seen a commonality to when this problem happens, but seems random at this point and will occur several times a day.
Any help in narrowing the problem down would be a huge help!