Hi @azcpbg.prod
Thank you for sharing your issue on Microsoft Q&A.
I understand that you are encountering an MFA error while trying to add the MPN ID in the Salesforce Outlook Integration under app registrations in Microsoft Entra ID.
Could you please provide more details about the error message you're encountering? If possible, could you also share a screenshot of the error to help with troubleshooting?
If you have more specific questions or need further details, please feel free to ask!
Best regards,
Harshitha Eligeti.