authenticator app not working

Hi @Alberto Orozco,

Good day, and I hope you’re doing well.

This issue may be related to Multi‑Factor Authentication (MFA) being required for the Microsoft 365 business account while the associated authentication method was not available during the login attempt. Based on common scenarios, this can occur when changes are made to the Microsoft Authenticator app or the mobile device used for verification, such as reinstallation, device replacement, or removal of the work account, particularly if limited or no alternative verification methods are configured. In such cases, while the account credentials may still be valid, the additional verification step cannot be completed.

As a member of the community support team, I have limited access and cannot modify MFA settings for user accounts. For security reasons, the appropriate recovery options may differ based on your role in the organization.

Option 1: Contact your IT admins

If you are either an admin or end-user in your company, please check if there are other IT admins who still have access and share with them the steps outlined in the article Manage user authentication methods for Microsoft Entra multifactor authentication. This will help them assist you in resetting your MFA settings and restoring access to the account.

Once the admin completes this process, your previous sign-in sessions will be cleared, and the next time you log in, you will be prompted to set up MFA again from scratch.

Option 2: Contact Microsoft Data Protection Support by phone (Please proceed with the third option if contacting phone support is not applicable to the situation)

If you are the only admin, in this situation, Microsoft’s Data Protection team has processes in place to verify ownership and help restore access to administrator accounts. You can try reaching out to the Global Customer Service phone to raise a request for resetting your authentication method here: Customer service phone numbers - Microsoft Support. During the call, request to speak to an agent, and share with them every detail related to your query and also mention that you are the only admin lost access to your account. This should allow you to contact the appropriate team so you can solve this incident as soon as possible.

Please note that forum moderators do not have access to user account settings and cannot assist with logging in, resetting passwords, or changing access rights. While we do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues, we’ll continue doing our best to support you within the scope of our responsibilities.

Here are some tips and an example of a prompt to help you navigate the IVR more effectively:

IVR: What kind of problem are you concerned about?

You: Authenticator.

A: What products do you use?

B: Office 365 for business.

Verification: Education or company account?

B: For companies

A: Are you an administrator?

B: Yes.

A: Are there any other administrators in your organization?

B: No.

IVR: Do you need a... Service request?

You: Yes. I need to create a ticket. Please send me directly to the Data Protection Team.

Option 3: Create a new tenant to submit a support ticket (Alternative method)

If you cannot reach a live agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription via this link: Microsoft 365 Business Plans and Pricing | Microsoft 365. (please select "Try for free" under a business subscription).

When prompted, enter your email. You can use your personal email or create a new Microsoft personal account for this step.

Then select Set up account to move forward.

From this step, the system should guide you through creating your tenant and assign you a default onmicrosoft.com domain.

Once set up, you can access the admin console of the new tenant and submit a support ticket requesting to speak with the Data Protection team on behalf of your previous tenant.

To create a support ticket: In the Microsoft 365 admin center > Help & Support.

In your ticket description, you'll need to clearly explain that you're trying to regain access to your previous Microsoft 365 tenant and need help from the Data Protection team. Here's a message you can use or adapt:

"Hello, I’m the only global admin, but I'm unable to access my previous Microsoft 365 tenant due to losing MFA access.

I created this new tenant solely to request assistance. I kindly ask to be connected with the Data Protection team to verify my identity and help me recover access to the original tenant.

This is urgent, as I rely on Microsoft 365 for my work and have been unable to operate for several days. I’m available to provide any documentation or verification needed to support the recovery process."

It is important to note:

• Please remember to turn off recurring billing for your trial subscription once your issue is resolved to avoid any unintended charges. You may prefer the following resource for detailed instructions: Cancel your Microsoft business subscription in the Microsoft 365 admin center | Microsoft Learn.
• During the initial setup of the trial tenant, please ensure MFA is configured and not skipped, as skipping this step may result in access issues or restricted recovery options later.

I hope this helps you regain access to your account quickly. I'm glad to assist and truly hope the information provided has been useful. Please feel free to reach out anytime if you need further assistance.

If you find my post useful, kindly consider upvoting it. Doing so can assist others in the community who may have similar questions in finding solutions more quickly.

Thank you for your kindness and contributions to the forum.

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Follow these steps to get back into Teams when Microsoft Authenticator is not giving a code and the account is stuck in the app:

1. Check for the “Authentication did not complete” causes
   • Make sure the Microsoft Authenticator app is unlocked when trying to sign in; if the app is locked, the prompt or code entry box may not appear.
   • Ensure notifications are enabled for Authenticator on the phone so prompts are not silently blocked. Also check SMS messages in case a code was sent there.
   • Confirm the app is updated to the latest version from the app store.
   • Verify the phone has a working internet connection (try switching between Wi‑Fi and mobile data).
   • Ensure the device date and time are set automatically and are correct.
   These issues can cause the “Authentication did not complete” behavior and prevent codes or prompts from appearing.
2. If the Authenticator account tile is gray or inactive
   • Inactive or gray tiles in Authenticator can be created by other apps for single sign‑on and do not need management; they can be safely ignored. Focus on the active work account tile used for Teams.
3. If still unable to authenticate
   • If there is another sign‑in method configured for the work account (SMS, email, security key, etc.), use that alternative method to sign in to Teams instead of the app code.
   • If no alternative method works and this is a work or school account, contact the organization’s IT admin or Help desk and ask them to clear or reset MFA settings for the account. After they reset, sign in again and re‑register Microsoft Authenticator when prompted.
4. If the device with Authenticator is lost or unusable
   • Use another sign‑in method if available.
   • If that is not possible, ask the organization’s Help desk to clear the account’s two‑factor verification settings so Teams sign‑in can be re‑set up from scratch.
5. Removing the stuck account from Authenticator (if needed)
   • Open Microsoft Authenticator, tap the work account, tap the Settings gear, then Remove account. After removal, the device can no longer be used to verify sign‑in for that account, and the account will need to be re‑added when MFA is reset by IT.

If none of the above works and there is no admin access or alternative method, the organization’s Help desk or Microsoft support (via the tenant admin) must be involved to reset the MFA configuration; this cannot be bypassed from the Teams client alone.

References:

• Troubleshoot problems with Microsoft Authenticator
• Common problems with two-step verification for a work or school account
• How to sign out from Authenticator