1
Locate the workspace name at the top of your left sidebar menu and click the down arrow next to it
2
Click "Preferences"
3
Scroll down to "Sound & appearance" and make sure "Mute all messaging sounds from Slack" is unchecked
4
Click on the down arrow for each notification sound to reveal more sound options. You will hear a sample as you click on it.\
Select the one you want.
5
Under "Deliver notifications via...", click on the down arrow and select "Windows Action Center"
If you're not receiving Slack notifications, go to Windows Settings
6
Click on "Notifications"
7
Make sure "Notifications" is "On" and "Do not disturb" is "Off"
8
Scroll down the page to the list of apps and make sure Notifications are "On" for Slack
