I recently switched to Outlook from Mail.app for my work emails. Using Hook to generate a link based on items in Outlook yields a URL in the following format: hook://outlook/22637
Hooks I create today and use seem to work just fine. However, links I created a few days ago do not. There is no notification from either Hook or Outlook that the item can not be found. There’s just no indication from anything that an operation had failed.
If I go and trace the original email and use Hook to copy a new link, I am given a new URL which does work.
For what its worth, I am not linking emails to documents specifically. I am using Hook to generate Markdown links to emails, and then dropping those links in the notes of various nodes in a Mind Map I am using to organize my to-dos.