Microsoft Error 500121, This started happening last Friday where suddenly Microsoft could not Error code 500121 in Microsoft Authenticator usually indicates a mismatch between the time settings on your device and the server. This error often appears if the user hasn't completed setting up MFA. Despite contacting Microsoft 365, Azure support, and posting in I am receiving Error Code: 500121 and Request Id: 42fa61c7-7993-4709-bcaa-aa5c4a2bcb00. The error code 500121 usually means that the multi-factor authentication (MFA) process wasn’t completed—this could be due to a missed prompt, timeout, or an issue with the Authenticator Access lost for MFA. Copy the information to the clipboard Error Code: 500121 Request Id: 72db66da The error code 500121 usually shows up when the security code from your Microsoft Authenticator app isn’t syncing properly. Please try to find the related hotline number to call the frontline and let them raise a ticket for you: Customer service phone numbers - Microsoft Support Please carefully follow this instruction I installed a mobile authenticator, but when it asks me to enter the authenticator code on the mobile device, how do I do that?Error Code: 500121 We have a user that her MFA stuck and keep getting error : 500121 . Now I can’t get in to my account? Please help me with this! Error Code: 500121 Request Id However, since today Microsoft was either producing 8 digits codes instead of 6 digits, and when I figured a way to add the Microsoft Personal Account with 6 digits is now responding with Error code 500121 Trying to access Sharepoint, my own files no problem. This error often occurs if the user The error code 500121 indicates that the user didn't complete the Multi-Factor Authentication (MFA) prompt. Kick off your AdminDroid journey! From setting up to scaling up, our documents are your go-to resource for managing your Microsoft 365 environment. Accidental Solve Microsoft 365 sign-ins blocked by error 500121 with step-by-step solutions for end users and admins to resolve strong authentication failures. The Error 500121 in Microsoft Authenticator indicates a failure during the multifactor authentication (MFA) process, commonly caused by time‑synchronization issues or MFA How to fix the error code 500121 in Microsoft Authenticator? The error code 500121 specifically indicates an interruption in the authentication process, where a required second factor of authentication (like I’ve been facing an Azure AD authentication issue (Error Code: 500121) since November 19, 2024, which is preventing user sign-ins. Below are the details of the error: Error Code: 500121 The combination of keeping Report Suspicious Activity and Fraud Alert enabled at the same time gives defense-in-depth layers of security, with The error code 500121 indicates that the user didn't complete the Multi-Factor Authentication (MFA) prompt. This would allow you to create a new tenant following the prompts Details For the past week, attempting to use Multi-Factor Authentication (MFA) to log in to the admin account has been unsuccessful. Now I can’t get in to my account? Please help me with this! Good day! I have facing a problem to access my account, issue were started when i unregistered the previous account on my device and registered another new account on my Incorrect time settings or outdated software are common reasons why codes fail and can lead to errors like 500121. I contacted my own 500121 は MFA が完了されていないことを示しています。 Microsoft Entra サインイン エラーをトラブルシューティングする方法 全ての Entra ID 管理者が管理センターへのサインインを The error code 500121 usually means that the multi-factor authentication (MFA) process wasn’t completed—this could be due to a missed prompt, timeout, or an issue with the Authenticator app What should I do when getting the error code 500121 Kishan Jethwa 0 Apr 10, 2023, 2:17 PM Authenticator app issue / Error code 500121 Santiago Fajardo 5 Jan 8, 2026, 7:34 AM Error code 500121 is an authentication sign-in failure often caused by permission, policy, or token issues; fix it by checking access and logs. com), the Microsoft Authenticator app displays a valid 6-digit TOTP code, but An external user who has been invited to access an internal SharePoint site is coming across an MFA error trying to access the site - any ideas why and how A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation Comment Use comments to ask for clarification, Manage authentication methods for Microsoft Entra multifactor authentication Once the administrator completes the revoke and re‑registration requirements, please delete the existing Good day! I have facing a problem to access my account, issue were started when i unregistered the previous account on my device and registered another new account on my Dora-T 13,060 • Microsoft External Staff • Moderator Jun 19, 2025, 4:56 PM Hi @ Cupp, Jaydin Lee Thank you for posting your question in the Microsoft Q&A forum. Hello, I’m unable to sign in to my Microsoft 365 business account. Please try again. Even if the app shows a valid code, it can still be rejected if This comprehensive guide explains what error 500121 means, why it happens, and provides step-by-step instructions on how to fix Microsoft What Is Microsoft Authenticator Error 500121? When you see error 500121, the authentication handshake between your device and Microsoft’s I'm encountering an issue with Azure AD authentication and need assistance resolving it. To resolve this issue, please ensure that the time and I am getting the following error when I try and access my work account to update details. Even if the app shows a valid code, it can still be rejected if The error code 500121 usually shows up when the security code from your Microsoft Authenticator app isn’t syncing properly. Visit Microsoft 365 Business Plans and Pricing | Microsoft 365, then select "Try for free" under a business subscription. Error code 500121 is an authentication sign-in failure often caused by permission, policy, or token issues; fix it by checking access and logs. While it works perfectly on a normal account, access Good afternoon, I am the administrator of the Power BI account for my company. The best way is to reset your MFA option, so that you can re-configure it when you login the next time. Since the device registered for second-factor Manage user authentication methods for Microsoft Entra multi-factor authentication 2. se) using Microsoft Authenticator. Error Code: 500121 Request Id: Error 500121 occurs when Microsoft Authenticator fails to verify MFA codes on Samsung Fold 7. Contacting Microsoft Data Protection team by phone support In this situation, the Microsoft Data Thank you for posting your query on Microsoft Q&A. have googled and tried every video error code 500121 is all error i get. First, ensure your iPhone’s date and time settings are set to automatic. Please try to find the related hotline number to call the frontline and let them raise a ticket for you: Customer service phone numbers - Microsoft Support Carefully follow this instruction to ask Solve Microsoft 365 sign-ins blocked by error 500121 with step-by-step solutions for end users and admins to resolve strong authentication failures. how to get back the access for this <Moved from Office/Access> You may receive a Error Request denied (Error Code 500121) when logging into Microsoft 365 or other applications that may uses your Microsoft 365 login information. The login process always asks me to approve the request in the Microsoft Authenticator app, but I no longer have my Customer: I can't log into my microsoft 365 account and my cannot use my authenticator app Technician's Assistant: Which device are you using to access your Microsoft 365 account and To create a Support ticket, you can go to Microsoft 365 admin center Please follow this article: Get support - Microsoft 365 admin | Microsoft Learn. Possible to revoke by edit in CP PANEL to A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation I’ve been facing an Azure AD authentication issue (Error Code: 500121) since November 19, 2024, which is preventing user sign-ins. Troubleshooting details If you contact your administrator, send them this information. Bonjour, J'obtiens l'erreur suivante en tant qu'administrateur: Error Code: 500121 C'est vraiment urgent Cordialement For additional details, please refer to the following link E rror 500121 when trying to use the Authenticator app - Microsoft Community We hope this helps resolve your issue. My Authenticator app isn’t giving me a verification code Hi, I have a client who is having issues signing into their Microsoft account. Even if the app shows a valid code, it can still be rejected if This comprehensive guide explains what error 500121 means, why it happens, and provides step-by-step instructions on how to fix Microsoft Error 500121 blocks Microsoft Authenticator MFA sign-in. To resolve this issue, please ensure that the time and From my research, this error code typically indicates an authentication failure during a Multi-Factor Authentication (MFA) request in Azure Active Directory (now known as Microsoft Entra ID). Now I can’t get in to my account? Please help me with this! Error Code: 500121 Request Id When trying to access an external partner's SharePoint, I do not get a Microsoft Authenticator notification although I have the app and am successfully logged in. Although I have authenticator on my phone, I receive no request. Comes up code 500121 I am getting the current error code when trying to switch to my organization on teams and Microsoft accounts Error Code: 500121 Request Id: 489147c3-4fc1-4c5d-9dd5 Error code 500121 usually indicates a problem with the authentication process. Keeps coming up Authenticator, but wont send number through. Error Code: 500121 This typically occurs when authentication failed as part of the multi-factor authentication (MFA) request, it may indicate a configuration or service error. Locked Out Of Microsoft account - Error Code: 500121 Sorry, we're having trouble verifying your account. azure. Others sent with a link are forcing it through authenticator which is not How to fix error 500121 on Microsoft Authenticator Blair Dawson 0 Apr 24, 2026, 4:54 AM How to fix the error code 500121 in Microsoft Authenticator? We would like to show you a description here but the site won’t allow us. Please let us know if you need The error code 500121 usually shows up when the security code from your Microsoft Authenticator app isn’t syncing properly. Fix it fast: sync device time, unblock your account in Entra ID, or reset MFA registration. Hello one vir, Based on your description, it appears that you are unable to log into the Azure Portal due to an incomplete MFA process. My Authenticator app isn’t giving me a verification code Error 500121 in Microsoft Authenticator often indicates a conditional access or multi-factor authentication policy issue. I’ve lost access to my Microsoft Authenticator app and can no longer log into my account. com) as the administrator, but I’m unable to complete the MFA (Multi-Factor Authentication) process. I've followed all the correct steps: Hello, I am signed in to my work account on the desktop computer at work and decided to update the Security Info of my account. This question was migrated from the Microsoft Support Community. I have already downloaded the Authenticator app and it does not work. com) with my personal Microsoft account (******@live. Below are the details of the error: Error Code: 500121 The Authenticator wont show us How do I fix error code 500121. Error code 500121 usually indicates a problem with the authentication process. 🚨 Newest blog post is up now🚨 If you've ever faced the frustration of a failed sign-in due to "Authentication failed during strong authentication request," you're not alone. To protect your personal information, I’ve I'm trying to sign in to my Microsoft 365 business account (******@XXXX. I'm really sorry to hear Error Code: 500121 This typically occurs when authentication failed as part of the multi-factor authentication (MFA) request, it may indicate a configuration or service error. Error Code 500121 in the Outlook app signifies an authentication failure during a strong authentication request, most commonly related to Multi-Factor Authentic I'm encountering an issue with authentication and need assistance resolving it. Copy the information to the clipboard Error Code: 500121 Request no matter what i do cannot get my school account logged in on my auth app. Contact IT Support: Since you provided an error code (500121), it may be helpful to contact your Problem When signing in to the Azure portal (portal. onmicrosoft. The error code 500121 usually shows up when the security code from your Microsoft Authenticator app isn’t syncing properly. I understand that you are receiving Error Code: 500121: indicates Authentication failed during Very frustrated! 1st time using Microsoft 365 business premium. I have reset the user's MFA several time and set it up again . Ensure the device’s date and time settings are set to automatic, as incorrect time causes token mismatches. When I went to access it though, it asked me to put in a Troubleshooting details If you contact your administrator, send them this information. the user MFA account is setup correctly Hi everyone, I'm having persistent issues signing in to my personal Microsoft account (<Mod remove PII> @live. Even if the app shows a valid code, it can still be rejected if im getting the Error 500121 when trying to use the Authenticator app. Dealing with sign-in error code 500121 can be frustrating, but understanding the root cause often reveals a straightforward solution. Copy the information to the clipboard Error Code: 500121 Request Id: 72db66da wont let me log in to transport for nsw site. 🛑 Facing sign 「Azure Portal にサインインできていたのに、ある日突然 6 桁コードを求められ、手元の Microsoft Authenticator は 8 桁コードしか出ない」「Error Code 500121 が出てポータルに入れない」という The error code 500121 usually shows up when the security code from your Microsoft Authenticator app isn’t syncing properly. Please help The question is since error 500121 means the user did NOT pass MFA, does that mean that the attacker provided username and 'correct password'? Is it possible to reach MFA stage im getting the Error 500121 when trying to use the Authenticator app. I still know my Error code 500121 Trying to access Sharepoint, my own files no problem. Others sent with a link are forcing it through authenticator which is not accepting my one Visit the Microsoft account recovery page and follow the prompts to reset your password. The error code 500121 indicates that the user didn't complete the Multi-Factor Authentication (MFA) prompt. . Even if the app shows a valid code, it can still be rejected if How do I fix error code 500121. Despite contacting Microsoft 365, Azure support, and You are facing Error 500121 while using the Authenticator app with the personal Azure account and receiving eight-digit authenticator code when Error Code: 500121 This typically occurs when authentication failed as part of the multi-factor authentication (MFA) request, it may indicate a configuration or Troubleshooting details If you contact your administrator, send them this information. You can vote on whether it's helpful, but you can't add comments or replies or follow the question. Now, still hanging reply from technical support to reset. Am getting the Error 500121 when trying to use the Authenticator app. Locked Question. 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