I recently upgraded to Office 365. Since this upgrade I cannot run EFile State SUI downloads from the payroll center. When I run the process, I receive an error in Excel stating "The file format and extension of State_SUI.xlt don't match. The file could be corrupted or unsafe. Unless you trust its source, don't open it. Do you want to open it anyway?". When I select yes, and proceed with the Add-Ins Interview, I receive workbook format errors. In other words, the SUI report being generated from QB is not formatted correctly to be read by Office 365 Excel. Is Office 365 not compatible with QuickBooks?