Didnt get push notifications

Question

Error Code: 500121

Request Id: [Moderator note: Personal information removed]

Correlation Id: [Moderator note: Personal information removed]

Timestamp: 2026-06-08T06:36:19Z

Answer 1

Hello @Muhamad Ikhwan,

Thank you for sharing your question.

Error code 500121 usually means that the Multi‑Factor Authentication (MFA) verification was not completed successfully. In many cases, this happens when the Microsoft Authenticator push notification was not received, was missed, or the MFA setup process was not fully completed.

If you have not completed your MFA setup yet, please follow the steps below to configure or reconfigure Multi‑Factor Authentication (MFA):

• Install the Microsoft Authenticator app on your mobile device.
• Sign in to your Microsoft account security page using your password or Temporary Access Pass (TAP), if provided by your organization.
• Select Add sign-in method > Microsoft Authenticator (or another authentication method allowed by your company policies).

• Open the Microsoft Authenticator app on your mobile device, tap the Add (+) button, then choose Work or school account.
• Scan the QR code displayed on the screen using the Microsoft Authenticator app.
• Make sure notifications are enabled for the Microsoft Authenticator app on your mobile device.
• Complete the test approval notification during the setup process.
• After the setup is completed successfully, try signing in again.

You can also manually open the Microsoft Authenticator app to check whether there is a pending approval request.

For your reference: How to troubleshoot sign-in errors | Azure Docs

If the issue still persists after completing the setup, I would recommend you contact your organization account's Admin to reset your MFA settings through the Microsoft Entra Admin Center. If you haven’t yet reached out, here’s a helpful guide to locate your Microsoft 365 administrator: How do I find my Microsoft 365 admin? - Microsoft Support  

Ask your administrator to follow these steps:    

• Go to Microsoft Entra Admin Center: https://entra.microsoft.com  
• Navigate to Entra ID > Users > All Users.  
• Select your user account.  
• Go to Authentication Methods.  
• Click "Require re-register multifactor authentication".  

If you're an IT admin, please check to see if there are other IT admins in your organization who can help you with the reset. 

If you are the only administrator in this tenant, you will need to contact the Microsoft Data Protection team, as they are the only group authorized and equipped with the necessary tools and verification procedures to confirm your identity and restore administrator access. 

Please try to find the related hotline number to call the frontline and let them raise a ticket for you (expand region under Business Users to find supported number for your country) : Customer service phone numbers - Microsoft Support 

Carefully follow this instruction to ask for Microsoft Data Protection team support:   

Depending on your country or region:

For some countries, when calling the support number, although there are about 30 seconds opening as something "you can visit the link...." But you can ignore this opening and wait until the option, then "1" as a business email user, "1" again for technical help.   

For some countries, it will be an automated conversation like:    

• First, when you call the hotline, it asks what kind of problem you are worried about.   
• Answered: authenticator.   
• A: What kind of product are you using?   
• B: Microsoft 365 for business.   
• A confirmation: education or company account?   
• B: For companies   
• A: Are you an administrator?   
• B: Yes.   
• A: Do you have the other admin in your organization?   
• B: No.   
• A: You need one.... Service request?   
• B: Yes   

If your subscription is from a partner or reseller, contact the reseller's support provider to help open a service request on behalf of you instead.   

I’d like to clarify that as a forum moderator, I do not have access to user sign-in logs, cannot reset MFA, revoke access, or contact Microsoft Support on your behalf. Please consider me an end user as well, providing guidance based on experience and documented processes. 

If you encounter any difficulties in contacting the frontline support, please feel free to let me know.

Thank you for your time, and I hope this helps resolve the issue.

---

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.