diff --git a/init.el b/init.el
index 6141a61..3b73108 100644
--- a/init.el
+++ b/init.el
@@ -567,7 +567,9 @@ search commands like `db/helm-shortcuts’."
              db/pretty-print-xml
              db/bookmark-add-external
              db/bookmark-add-url
-             db/lookup-smime-key))
+             db/lookup-smime-key
+             db/org-onenote-open
+             db/org-outlook-open))
 
 (use-package hydra
   :commands (defhydra))
@@ -643,6 +645,16 @@ search commands like `db/helm-shortcuts’."
              hydra-org-clock/body
              db/make-org-capture-frame))
 
+(defcustom db/path-to-onenote "c:/Program Files (x86)/Microsoft Office/Office15/ONENOTE.EXE"
+  "Path to OneNote executable, for opening corresponding org-mode links."
+  :group 'personal-settings
+  :type 'file)
+
+(defcustom db/path-to-outlook "c:/Program Files (x86)/Microsoft Office/Office15/OUTLOOK.EXE"
+  "Path to Outlook executable, for opening corresponding org-mode links."
+  :group 'personal-settings
+  :type 'file)
+
 (use-package org
   :commands (org-store-link)
   :bind (:map org-mode-map
@@ -762,6 +774,11 @@ search commands like `db/helm-shortcuts’."
             (when (eq system-type 'cygwin)
               (add-to-list 'org-file-apps '(t . "cygstart %s") t))
 
+            ;; Custom link types for Windows
+            (when (eq system-type 'windows-nt)
+              (org-link-set-parameters "onenote" :follow #'db/org-onenote-open)
+              (org-link-set-parameters "outlook" :follow #'db/org-outlook-open))
+
             ;; Skip some org mode regions to be skipped by ispell
             (add-hook 'org-mode-hook #'endless/org-ispell)
 
diff --git a/site-lisp/db-utils.el b/site-lisp/db-utils.el
index 82ff474..359ae37 100644
--- a/site-lisp/db-utils.el
+++ b/site-lisp/db-utils.el
@@ -507,6 +507,18 @@ This is done only if the value of this variable is not null."
   (call-process "xrandr" nil nil nil
                 "--output" "HDMI-3" "--off"))
 
+(defun db/org-onenote-open (path)
+  "Visit OneNote document on PATH."
+  (unless (file-executable-p db/path-to-onenote)
+    (user-error "Path for OneNote is not executable, please customize `db/path-to-onenote’."))
+  (start-process "OneNote" nil db/path-to-onenote "/hyperlink" path))
+
+(defun db/org-outlook-open (id)
+  "Open the Outlook item identified by ID.
+  ID should be an Outlook GUID."
+  (unless (file-executable-p db/path-to-outlook)
+    (user-error "Path for Outlook is not executable, please customize `db/path-to-outlook’."))
+  (w32-shell-execute "open" db/path-to-outlook (concat "/select outlook:" id)))
 
 ;;; Bookmarks