Accessing Microsoft Teams using organizational or personal credentials
Hi Pankaj Gope,
Greetings. Since your question is posted in the Microsoft Teams / Teams for business / Sign up and sign in / Sign in category, so suppose you are encountering this problem when using your Microsoft 365 for Business account sign into Microsoft Teams client.
Based on the error message, it seems your organization's administrator has set up MFAfor your account, under this situation, you need to set up your user account to use it. For the detailed instructions, please see: Set up your Microsoft 365 sign-in for multi-factor authentication.
If I misunderstood your scenario or you need further assistance, please feel free to let me know and share more specific information about your problem with us, we will continue to try our best to assist you.
Best Regards,
Jennifer