I understand your concern. It’s important to note that the notifications you’re seeing are likely cached on your device, it is recommended that you take the following steps:
- Clear the cache of your Outlook app: This can help remove any stored data, including notifications, from your device. You can do this in the settings of your iPhone.
- Check for suspicious activity: Microsoft provides tools to help you investigate suspicious activity on your account. If you notice unfamiliar changes to critical security settings or unusual activity in your mailbox, it’s recommended to investigate further. See: Responding to a compromised email account.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.