2548510 - The file format and extension don't match. The file could be corrupted or unsafe. when trying to edit a file

When trying to edit a xls or xlsx file in Disclosure Management you receive the following warning:

The file format and extension don't match. The file could be corrupted or unsafe. Unless you trust the source, dont open it. Do you want to open it anyway?

Excel cannot open the file 'filename.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.

SAP Disclosure Management 10.X

Microsoft Office 2016

Microsoft Office 365

Windows 10

Internert Explorer 11

The file format and extension don't match, The file could be corrupted or unsafe, office 365, Office 2016, Excel cannot open the file, file name not valid , KBA , 3rd party tools config and system admin , defect , EPM-DSM-GEN , DM core functionalities , Problem