


In this case, you can resolve the issue by accessing your Excel settings and disabling Protected Views from the Trust Center Menu. Protected Views is Enabled – There’s also a new security option that might end up preventing the main excel application from opening certain files that we obtained through an email attachment.To fix this problem, you can rely on another 3rd party tool equivalent like OpenOffice Calc (belonging to the OpenOffice suite). The file is incompatible with Excel – As it turns out, this issue can also occur due to an incompatibility between the file you’re encountering the issue on and Excel.In this case, you can resolve the issue automatically by unblocking the file via the Properties menu. Nowadays, a lot of email providers will block it automatically for security purposes.

Excel file is blocked – If you obtained the Excel file after downloading it from an email attachment, there’s a high chance that the file is blocked at a Properties level.If this scenario is applicable, you can fix the issue by changing the extension manually to the correct one. This can happen automatically after the file is converted or manually after a user intervention. Incorrect extension – It the majority of cases, this particular issue will occur because the Excel file you’re trying to open is in fact of a different extension than the one that’s currently hardwired.
