On Outlook 2013, if you write :\ it becomes a slanty smily face. Give that I often am telling people where on the shared disc drives to find files, that is NOT. FUCKING. HELPFUL.
Try This....
Open Microsoft Outlook (if it’s not already open).
Fire up the Options panel (found under the File ribbon).
Click open the Mail tab. You should see a “Spelling and Autocorrect…” button. The “Editor Options” panel will launch.
From there, click the “AutoCorrect Options…” button. The “AutoCorrect: English (U.S.)” properties pane is what you should see next.
Under the default “AutoCorrect” tab, look to the “Replace text as you type” section.
Click the “Delete” button.
Repeat these steps for the other smiley auto-replacements.