How to change Outlook on the Web's notification sound on Mac
Outlook on the Web gives you an on/off sound toggle on macOS and nothing more, so you cannot choose which sound it plays. To silence it, turn off “Play sound for notifications” for Outlook on the Web in System Settings → Notifications. To give it a different sound, or a different sound per channel, person, or keyword, you need a rule-based app such as Chirpy, which reads macOS notifications locally and plays the sound you assigned.
The honest answer: Outlook on the Web only gives you basic on/off controls. Your real options are the macOS-level method below, or Chirpy if you want per-notification customization.
In Outlook on the Web
Head to Settings → Notifications inside Outlook on the Web. The sound options live there, and you can turn them off. That stops Outlook on the Web's own audio, but macOS will still play its default sound on top. See the universal approach below to silence that too.
How do I mute Outlook on the Web notifications on a Mac?
macOS lets you silence any app's sound without disabling its notifications. The full visual walkthrough lives on the universal macOS method page. The short version:
- Open System Settings → Notifications on your Mac.
- Scroll to Outlook on the Web in the application list and click it.
- Turn off “Play sound for notifications”.
- Outlook on the Web keeps showing banners and badges, with no audio.

How Chirpy fills the gap
With Chirpy you can give Outlook on the Web's notifications a sound that matches their importance. For example: a quiet chime for routine updates, a louder bell for mentions, silence for the rest. All triggered by keywords in the notification text, with no plugin and no API access required.
Frequently asked questions
Can I change Outlook on the Web's notification sound on Mac?
Only partly. Outlook on the Web gives you basic on/off sound controls, but no way to pick a different sound and no way to vary it by sender or content. To assign a specific sound, mute Outlook on the Web at the macOS level and let a rule-based tool such as Chirpy play the sound instead.
How do I mute Outlook on the Web notifications on Mac without turning them off?
Open System Settings → Notifications, click Outlook on the Web in the list, and turn off “Play sound for notifications”. Outlook on the Web keeps showing banners and badges, so you stop hearing it without losing it.
Can I set a different sound for specific Outlook on the Web notifications?
Not with macOS or Outlook on the Web alone, because neither can read the content of a notification and act on it. Chirpy matches the notification text against rules you write, using a name, a channel, a keyword, or a combination with AND/OR, then plays the sound you assigned to that rule.
Does muting Outlook on the Web in System Settings also hide its banners?
No. “Play sound for notifications” only controls audio. Banners, the Notification Center list, and Dock badges are separate toggles on the same screen.
Want sounds that actually mean something?
Chirpy adds rule-based custom sounds on top of macOS notifications. One sound for Outlook on the Web mentions, another for your calendar, silence for the rest. It is a native menu bar app. $19.99 as a one-time purchase, requires macOS 13 or later, and runs entirely on your Mac.