Troubleshooting Steps for Table of Contents Not Updating:

1. Check Headings: Verify the headings used in the document are formatted as heading styles (Heading 1, Heading 2, etc.).
   
2. Review Table of Contents Style: Review the table of contents style and confirm all of the required elements (heading levels, page numbers, etc.) are selected.
   
3. Modify and Update: Modify the heading formatting or table of contents style and use the Update Table command to update with the new elements.