The problem is that we have over a thousand Excel files and it's not possible to modify every each of them. We refer to something like right clicking the file and opening it in another way or Excel 365 being able to recognize the source of the problem and trying to open it in another way. Is it possible to open an Excel file developed with Office 2016 (32 bit) which includes incompatible instructions (in macros) with Office 365 (64 bit) from Office 365 (64 bit)? Like an add-in or something.