Hello Pramod KumarThank you for raising your query in the Microsoft Q&A Community.
I understand you cannot access your account due to an authentication issue.
Kindly contact the IT Team to help you reset your authentication method so you can re-register for authentication and be able to use your new phone for this purpose.
Below are the steps to be followed to achieve this
- Sign in to the Azure portal.
- On the left, select Microsoft Entra ID > Users > All users.
- Choose your account, select Authentication methods and click "Require re-registration for MFA".
Follow this link to see the roles that can perform this operation.
Let me know if further assistance is needed.
Babafemi