When a PDF originated in an Office application, Microsoft recommends making revisions in the original Office file and saving a new PDF afterward. This avoids treating a final distribution copy as the only editable version of the document.

Illustrative image
Illustrative image.

If the source file is unavailable, Word conversion or a suitable PDF editor may provide another route. Check the converted formatting before redistribution, especially when the document contains more than straightforward paragraphs of text.