Add support for background, border-style, border-width. This item is migrated to the Telerik Document Processing portal: http://feedback.telerik.com/Project/184/Feedback/Details/190147 Please use the new item for commenting, voting and subscribing instead of this one.
It seems to me that during the import from docx, the RadEditor creates some non-standard HTML styles, which are not-supported by the export to docx functionality. Could you, please, fix the docx import (copy & paste, strip MS Office styles) to create proper css styles?