The table preferred width value set to Auto or in percents is ignored and is always exported with fixed value. Steps to reproduce: Create a table with two columns in RadRichTextBox. Set the table preferred width to auto. Set the table cell preferred width for both columns to 50%. Export to Docx format. Observed result: the table has preferred width as fixed value 6.62 inches. The columns have the correct width. Expected result: the table preferred width to be auto.