How to login by verification with a new device without the old device

Dear Mariska Morgan,

Thanks for choosing Microsoft Community.

Based on your description, I understand the scenario you met. For this, I need to confirm with you whether you are using Authenticator for verify, right? If so, for this, please be kindly to check if the following can help you:

1. Authenticator App:
   • Install the App: Download and install the Microsoft Authenticator app on your new device.
   • Sign In: Sign in to your Microsoft account using your credentials.
   • Recovery: Use the recovery options (backup email or phone number) to verify your identity.
2. Alternate Methods: If the Authenticator app isn't working, try using another sign-in method, such as receiving a code via text message or email.
3. Troubleshooting Tips: Ensure your device is up to date, and check your network connection. Sometimes switching from mobile data to Wi-Fi or vice versa can help.

For your reference: How to get Microsoft Authenticator on new phone without old phone ... and How to login by verification with a new device without the old device ....

Meanwhile, if the above cannot help you, for this, I'm willing to help you, but since your problem is related to the authenticator app. And we're a forum that's responsible for issues and queries about the Teams client, so it's really out of scope of support. But there is a delicate team that focuses on the issues and consults on the authenticator application. Therefore, I sincerely suggest that you support the authenticator app community. Engineers who are responsible for authenticator app-related issues will provide you with more help. Believe that engineers will help you solve the problem. Your understanding and cooperation are greatly appreciated.

Thank you for your precious time. Have a nice day.

Sincerely

Katherine