Hi @Felix Lo ,
Welcome to our forum!
What's your account? An Outlook.com account?
If so, please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. You can refer to this article to reset your password: Change your password in Outlook.com. If it doesn't help, It's suggested that you could post your case in dedicated forum for Outlook.com for more professional advice.
Hope to help you!
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.