Microsoft tells you how in this link
Regards
Step 1.
Upload DOC-file
Click “Choose File” button to select a doc file on your computer. DOC file size can be up to 50 Mb.
Step 2.
Convert DOC to XML
Click “Convert” button to start conversion.
Step 3.
Download your XML
When the conversion process is complete, you can download the XML file.
I hope this resolve your query!
Ben Martin