Hi @Alen_Erased
Welcome to our forum!
Does the issue occur recently on Outlook Desktop Client? Do you have any specific operation before the issue occurred?
Where did the issue occur? On Classic Outlook or New Outlook?
If the issue occurs on Classic Outlook, you may take the following steps:
- Check Notification Settings in Outlook:
- File Options>Mail>Under Message arrival, ensure that Display a Desktop Alert is checked.
- File>Options>Advanced>In the Reminders section, select Show reminders>OK.
- Use Command:
- Close Outlook>Press Win+R>Type
outlook.exe /cleanreminders
>OK to run the command to see if the notifications appears.
- Close Outlook>Press Win+R>Type
- Check Rules:
- If you have a rule for incoming messages to be moved to a different folder, make sure that you set an arrival reminder in the rule.
- Check Windows Notification Settings:
- Settings>System>Notifications & actions>Make sure Get notifications from apps and other senders is turned on.
- Scroll down to find Outlook and ensure notifications are enabled. More information: Outlook notifications aren't working - Microsoft Support
If the issue occur on New Outlook, here are some steps you may want to take:
- Check Notification Settings:
- Settings icon>General>Notifications>Ensure all options are turned on.
- Uninstall and Reinstall:
- If the issue persists, you may try to uninstall and reinstall the New Outlook to see if there are any differences.
Hope it helps!
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