Hi @Tahreem A
Could you please tell me if you need a security code from Authenticator when you log in to Teams, but you can't receive this code?
Then please tell me further, can you log in to your security information page? If you can, it is recommended to log in to your personal information homepage to reset Authenticator (delete and re-add).
You can follow this link to open the Additional security verification page.
If you can't reset it yourself, it is recommended that you find an administrator of the organization, who can help you quickly reset it in the admin center.
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