Hi @Vikas Tiwari , This sample might be the most helpful one for you. It allows you to set up MFA on a policy, or require MFA for certain portions of an application but not others.
The issue though is that if you have MFA enabled, all users must register for it initially. It's a good security practice in the long run so users are better protected. But I do understand how this could be an issue for you.
Hopefully you can work with that sample to get close to your needs, but by default we don't offer the option to sign up later. Please let me know if you have any questions and I'd be happy to help.
If this answer helped you please mark it as "Verified" so other users may reference it.
Thank you,
James