A family of Microsoft word processing software products for creating web, email, and print documents.
As you may be aware, each Section in a document has three header and footer ranges. So,
• How many sections does the source document contain?
• How many headers & footers does each Section in the source document contain? If more than one Section, are these headers & footers linked to those of the previous Section(s)?
• How many headers & footers do the target documents contain?
• How many headers & footers does each Section in the target documents contain? If more than one Section, are these headers & footers linked to those of the previous Section(s)?
If there is a mis-match between the # headers & footers between the source & target documents, how do you want to handle that?
A different approach you might consider is to not do a bulk update but, instead, use a Document_Open macro in your template (which I assume the target documents are attached to), to update each target document when it is next opened.