You can certainly insert a hyperlink in a header or footer, exactly the same
way you do it anywhere else in a document.
But you can't click it to activate it unless you first open the header or
footer pane. You can do that with View > Header and Footer or by
double-clicking the header or footer area.
--
Regards,
Jay Freedman
Microsoft Word MVP
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.