I'm getting notifications that someone wants to sign in to my Outlook using the Authenticator

Dear @Bob Ligget,

Good day! Welcome to Microsoft Q&A forum!

Based on your description, I understand that you are receiving multiple Microsoft Authenticator notifications prompting you to approve sign-in attempts to your Outlook account. These requests are happening several times a day, and although you are correctly denying them, you’re concerned about how to stop these attempts from occurring altogether.

To make sure I understand your situation accurately, could you please confirm:

• Are you currently able to access your account without any issues?
• Are you using a personal Microsoft account (e.g., @outlook.com / @hotmail.com) or a work/school account (e.g., @yourcompany.com)?
• Are the alerts coming through the Microsoft Authenticator app, email, or both?

Your confirmation would be very helpful in ensuring you receive the most suitable support!

Based on what you described, receiving repeated unauthorized sign-in attempts can definitely feel alarming.

In most cases, this happens when your email address becomes exposed online, this can occur through past data breaches, leaks from websites you’ve signed up for, or even public listings where your email is visible. Once an email address is out there, it often gets picked up and circulated in large databases that are traded or shared across the internet.

That’s why you may suddenly see repeated sign-in alerts or 2FA prompts even though nothing has happened to your account directly.

The good news is that your two-factor authentication (2FA) is doing its job and by denying these requests, you’re actively preventing access.

Furthermore, depending on your account type:

1-If you are using a Personal account: You may want to try the alias sign-in method (highly recommended):

• Create a new email alias (something unique/random)
• Set it as your primary sign-in email
• Disable sign-in from your old email
• For your reference: Change the email address for your Microsoft account | Microsoft Support

2-If you are using a Business account: I recommend contacting your IT administrator within your organization.

They can:

• Review sign-in logs in detail
• Apply stricter security policies
• Help reduce or block repeated authentication prompts
• For your reference: Getting too many authentication attempts on my account - Microsoft Q&A

Kindly let me know when there are updates or if you need further assistance. Any updates you’re able to share would be really helpful. I appreciate your time and look forward to hearing how things are going! 

Thank you for your time and patience.

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I think MS allows changing the account password and removing any sign‑in methods you do not use and these two actions are the ones that stop the request before it can move forward.