Word – Quickly insert an internal hyperlink in a Microsoft Word document

Well, I figured it out, in a sense. I noticed that the "Insert Hyperlink" dialog actually has a "Bookmark" button (never noticed it before), which allows you to choose a bookmark from the other document. (This essentially adds a #hashtag to the end of your hyperlink.) This works fairly well from one Word doc to another, but unfortunately it doesn't work from Outlook to Word (I have Outlook tasks that I wanted to cross-reference to some particular documentation in a Word doc.) The other document will open, but not at the bookmarked location. (It also breaks the hyperlink if there happen to be spaces in the file path.)

UPDATE: Just tested this functionality with Excel 2013 and it works (opens Word at bookmark from hyperlink in Excel). However, I also tested it again in Outlook 2013 with the same results as before. (i.e., still broken. Although, interestingly, it opens a dialog box labeled, "Open Attachment", so apparently it interprets the hyperlink as an attachment which may somehow explain the aberrant behavior.) Still no workaround for Outlook.

I think custom styles never worked this way (at least since Word 2010). You should use original Heading styles to take advantage of this functionality.

See Microsoft forum thread for details.