I've followed a solution found at [superuser](https://superuser.com/questions/71786/can-i-create-a-link-to-a-specific-email-message-in-outlook) for capturing the unique identifier (UID) of an Outlook message stored in a PST file, and creating a org link of the form:

    [[outlook:UID][Message subject]]

Selecting this link in emacs opens the message in Outlook using a little Lisp stored as `org-outlook.el` in my `.emacs.d/lisp` directory, so I can access specific messages right from org. Really nice solution for integrating emails that I need to reference right from my notes.

The problem is that I also like to export my notes as html using `org-html-export` through `C-c C-e h o`, but the Outlook links get rendered as:

    <a href="UID">Message subject</a>

which tries (and fails, of course) to open a local file named "UID" instead of:

    <a href="outlook:UID">Message subject</a>

which my browser correctly passes off to Outlook.

Is there a way for me to custom define the link export format for an `outlook:` link? Kinda a newbie here, and I couldn't find anything on the topic.

Thanks