If you've lost access to your old phone and cannot clear the data from the Microsoft Authenticator app on it, you will need to follow the recovery process for your work account. Unfortunately, without access to the old device, you cannot directly clear the Authenticator app data or transfer it to your new phone.
Here are the steps you can take:
- Contact your IT support: They can help you reset your multifactor authentication (MFA) settings and assist you in setting up your new device.
- Use recovery options: If you had previously set up recovery options or backup for your Microsoft account, you may be able to recover access to your account through those means.
- Set up MFA on your new phone: Once your IT support has reset your MFA settings, you can download the Microsoft Authenticator app on your new iPhone and set it up again with your work account.
It's important to ensure that you do not factory reset your old device or remove the Authenticator app until you have successfully set up your new device, as this may complicate the recovery process.