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I am getting many requests per day for authenticator app that I am not making

Jason Horath 25 Reputation points
2026-02-01T18:19:47.7833333+00:00

Someone is accessing or attempting to access my authenticator by way of mass requests. What can i do? Just since last weekend I have gotten at least 12-20 requests per day that i did not request myself.

Microsoft Security | Microsoft Authenticator

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  1. Rob Koch 25,875 Reputation points Volunteer Moderator
    2026-02-01T22:16:42.25+00:00

    If these are a Microsoft Personal account receiving the MFA Fatigue attack requests, then this is something we've been seeing as a growing issue here in the forums, with reports of similar attacks nearly every day from all over the world.

    Since Windows 11 typically includes Windows Hello Face (camera), Fingerprint or PIN and an associated Passkey, the only way really left to try and bypass this local, closed authentication security is via an external method such as the authenticator. So, it's no surprise that these authenticator MFA fatigue attacks have grown in number.

    With the passwordless authentication option available, it's no longer actually required that a person attempting to recover their account know both username and password to generate such requests to the authenticator, so this is likely someone simply using a bot to continually aggravate an individual into giving up in disgust by allowing the request even if they should know better.

    Unfortunately, if that's what these repeated requests actually are, there's only one known method to avoid them at present using a 'Security by Obscurity' option by changing the account's email alias used to login, effectively making the original email account name useless except to continue to receive and send email to others. It's by obscurity, because you only use the new alias to login and otherwise keep it secret, never using it for email so it doesn't 'leak' and begin to receive its own set of fatigue attacks.

    The basic set of steps is to create a new (or if one already exists, use an alternate) email alias, set that new email alias as 'Primary', then in Sign-in preferences, uncheck the original email alias that's currently receiving the MFA Push fatigue attack notifications, so it can no longer be used for login or other account change requests.

    Do NOT remove the original email address, since you'll want to keep it for email use with others, while as already mentioned above, you should never use the new alias for that purpose, so it doesn't get 'seen' in public and potentially exposed for the same sort of MFA fatigue abuse.

    Here's the official Microsoft document for managing your account alias and on that same page, you'll see the Change sign-in preferences selection near the bottom where those are done.

    Add or remove an email alias in Outlook.com - Microsoft Support

    Obviously, you must always remember the 'new' alias to login in the future, since you can no longer use the original email address for that purpose (just like the MFA attackers), though if you don't remove it, you might be able to use your phone number in its place if you don't uncheck that. However, if the MFA attacks seem to continue even after changing the original email alias, it's worth unchecking the phone number to confirm that's not what the attackers were actually abusing.

    Rob

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  1. Charlie Berman 10 Reputation points
    2026-02-03T22:32:46.38+00:00

    I, too, recieve upwards of 20 approval requests per day. Even after disabling "Passwordless Authentication", I'm still able to sign into my account with just my email + approving the sign-in request through Microsoft Authenticator. Having set up 2Factor Authentication and disabling Passwordless Authentication should REQUIRE the password and THEN send an approval request - unfortunately whoever is managing this service at Microsoft has not made it work this way. This is a huge issue that potentially affects literal millions of accounts. MFA Fatigue is a very serious attack vector.

    I would also like to note that the rogue, ignored or denied, authenticator requests DO NOT show up on the Recent Activity page. This is also a huge issue that Microsoft hopefully addresses.

    Until Micrsoft can do something to resolve this, I can offer you a working solution that I've found:
    Ditch Microsoft Authenticator. Use something like Google Authenticator (get that set up before proceeding). And then...

    After logging into your account do the following:

    1. Reset your password with a secure, previously-unused, and unique password.
    2. Remove the Microsoft Authenticator from. your account
    3. Select "Add Another Way To Sign In"
    4. Select "Use An App"
    5. Select "Set Up A Different Authenticator App"
    6. Add your Google (If that's what you chose) authenticator

    Another option, that may help if you insist on using the Microsoft Authenticator, is to DISABLE notifications on your device for Microsoft Authenticator, and ONLY enable notifications when you intend to sign in.

    Microsoft: Please fix this HUGE security issue.

    2 people found this answer helpful.

  2. Georgi Yanakiev 0 Reputation points
    2026-03-30T10:43:59.2166667+00:00

    I was having the same issue but I watched a great video on how to prevent this. Basically follow these steps:

    1. Go to your Microsoft Account. https://account.microsoft.com
    2. Click on "Manage how I sign in".
    3. From the list, remove the "Send sign-in notification" option.
    4. Click on "Add another way to sign in to your account".
    5. Select "set up a different Authenticator app".
    6. Scan the QR code with Google Authenticator (or a similar app, but not Microsoft Authenticator)
    7. Type the code for verification and click Next.

    And here's the video: https://www.youtube.com/watch?v=DWQs28FgdCY

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  3. Marcin Policht 87,815 Reputation points MVP Volunteer Moderator
    2026-02-01T18:37:49.4833333+00:00

    What you are experiencing is almost certainly MFA push-bombing (also called MFA fatigue). An attacker already has your correct username and password and is repeatedly triggering login attempts, hoping you’ll eventually approve a request by mistake. This does not usually mean your phone or authenticator app is compromised, but it does mean your credentials are.

    The most important step is to immediately change the password on the account associated with those authenticator requests. Use a long, unique password that you have never used anywhere else. If that same password was reused on other sites, change it there as well. Until this is resolved, do not approve any authenticator requests you did not personally initiate, even once. If the app or service offers an option like “this wasn’t me,” use it every time.

    Next, review the account’s sign-in or security logs. Look for unfamiliar devices, locations, IP addresses, or successful logins you don’t recognize. If the service allows it, force a sign-out of all active sessions. This ensures anyone who may have gotten in is kicked out.

    If the platform allows it, move away from simple push-approval MFA. Push-only MFA is vulnerable to this exact attack. More secure options include time-based one-time codes, number matching for push requests, or ideally a hardware security key. Revoke your current MFA enrollment and re-enroll it after changing your password so that any existing authentication sessions are invalidated.

    You should also secure the email account tied to this login, since email is often the real target. Change that password, ensure it has strong MFA enabled, and review its login history as well. Many account takeovers succeed because email security was weaker than the primary account.


    If the above response helps answer your question, remember to "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

    hth

    Marcin


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