We have had this issue from the start and we thought or think it may be within our network but wanted to check to see if anyone else is having issues. Currently we are unable to Drag & Drop .XLSX, .DOCX, .PPTX (Microsoft Office) but are able to upload .CSV, .PDF, and Image files of all sorts. We are using Service Management Cloud so I would assume that this is not a setting that needs to be changed by us.
Any help or ideas would be appreciated.
Thanks!