How do I change the alert sounds in Outlook for Mac?

TheMattGeorge 

I figured out how to change the default sounds in Outlook for Mac. Basically you have to find the original sound files in Outlook via Finder and overwrite them with the ones you want. Follow the steps below.

1) Quit Outlook

2) Open Finder. Select ‘Applications’ from the left side list.

3) Find Outlook. Right-click on it and select ‘Show Package Contents’ from the list.

4) Open Contents folder and go to ‘Framework’ folder.

5) Look for ‘OutlookCore.framework’ file. Open it.

6) Go to ‘Resources’ folder and look for the mailerror, mailsent, newmail, nomail, reminder, and welcome .wav audio files 

7) Rename your custom sounds to match these names and replace the files in the 'Resources' folder.  (Your custom sounds must be in .wav format)

😎 Start up Outlook and enjoy your new sounds.