After the authenticator uninstall, couldn't get into Teams

nayye JR- 0 Reputation points
2026-09-03T06:01:57.8733333+00:00

Hello, everyone,

I creat a company account, when the sencond to enter the meeting, the system shows a notificatio: you must download a authenticator and scan a special QR code to vertify your account.

Later, I unbind and uninstall the authenticator. Now I want to get into the teams again, It shows, please fill the Verification code, could you help to share any instruction, thanks in advance.

各位好，

前两周，个人免费版在国内无法使用，公司注册了企业版teams。后来企业版登录页面显示：需要使用authenticator扫描QR码然后进行绑定，扫描以后，就解绑卸载了，以为后续可能用处不大。现在今天要开会，打算再次创建连接，显示无法登录，需要输入验证器上得代码，已经绑定该账号，30秒更新一次代码，输入后仍显示错误，目前已无解，麻烦各位如看到，请提供帮助，提前感谢.

Microsoft 365 and Office | Subscription, account, billing | For business | Other
0 comments

2 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Michelle Nguyen 1,755 Reputation points Independent Advisor
    2026-09-03T06:19:01.6033333+00:00

    Hi @nayye JR-

    Based on your description, it sounds like Multi-Factor Authentication (MFA) is enabled for your account, and the original Authenticator registration may have been removed when you unbound and uninstalled the app. Simply reinstalling Microsoft Authenticator does not always restore the previous MFA registration.

    Could you please confirm:

    • Are you the administrator of the Microsoft 365 tenant, or are there other admins in your organization?
    • Can you access your account through other methods, such as email, SMS, or backup authentication methods?

    If another administrator is available, they can reset your MFA methods from the Microsoft Entra admin center. After the reset, you should be able to sign in again and register a new Authenticator device. You can suggest that they check this article for steps on resetting MFA: Manage user authentication methods for Microsoft Entra multifactor authentication

    If you are the only administrator and no authentication methods are available, you may need to contact Microsoft Support for assistance with account recovery. You can find Microsoft's support numbers here: Contact Microsoft customer support | Microsoft Support 

    User's image

    Looking forward to your update.

    Was this answer helpful?

    0 comments
  2. nayye JR- 0 Reputation points
    2026-09-16T06:37:01.17+00:00

    Hi Michelle,

    Good afternoon,

    Thanks for your feedback, I am the only one in our team, maybe you can think me as the leader. I have submit the “Work Order” about the MFA, but no one contact me. Another, I try to contact your team by telephone, no one reply as well. Could you help to share any helps? Thanks in advance.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.