If you move, rename or delete a document that is a link destination all hyperlinks to it will be "broken". You can check the map for broken links to documents
To check for and repair broken file hyperlinks:
Click Tools - Repair Broken File Hyperlinks.
If a broken link is found, you can choose to browse for the file to repair the link or remove the link from the map.
Hint: If you click on a broken hyperlink you'll get a message that offers you the opportunity to repair it immediately.