On Oct 12, 2013, at 5:54 PM, Manish <mailtomanish.sharma@gmail.com> wrote:

> 
> 
> i'll look into rebuilding outlook profiles and spotlight indexes.
> meanwhile, following has worked consistently for me:
> 
> #+begin_src emacs-lisp
> (defun org-mac-outlook-message-open (msgid)
>   "open a message in outlook"
>   (do-applescript
>    (concat
>     "tell application \"Microsoft Outlook\"\n"
>      (format "open message id %s\n" msgid)
>      "activate\n"
>      "end tell")))
> #+end_src
> 
> cheers!
> --manish
> 

And I just submitted a patch that changes to Outlook message open to use Applescript as your code does.