To customize your Auto-correct settings go to File > Options


Figure 1: File, Options


Navigate to the Mail > Spelling and Auto-correct button

Figure 2: Outlook options dialog

Select Auto-correct Options. Note: There are several other Proofing options on this screen. Please take note and adjust should you desire.

Figure 3: Outlook options dialog

You will be presented with the Auto-correct settings.

Figure 4: Auto-correct options

For this example we will opt to replace msg with message. This will enable to use this abbreviation when composing a message, and allow Outlook to fill in the entire word for us.

Figure 5: Auto-correct options