I'm trying to add an attachment in Outlook to an email message. When I drag and drop the specified file, its file extension is in some cases converted to uppercase. It seems that the last character of the filename without the extension is checked, and if that's an uppercase character, then the extension is converted accordingly.
someFile.extis left unharmed;
HTTP.javais changed to
MIT.pdfis changed to
FileB.shis changed to
Why is that happening? Why should Microsoft convert the file extension and not just leave it alone?
And how can I disable this behavior? Or otherwise, is there a workaround available?