Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Trường Nguyễn1 Good day!Thank you for posting to Microsoft Community. We are glad to assist!Based on your description, I do apologize for inconvenience for unable to sign into your account due to authenticator app.Depending on the description, you can see Common questions about the Microsoft Authenticator app - Microsoft Support. If you don't see an answer to your question, it is suggested to post to the Microsoft Authenticator - Microsoft Q&A, because your query relates to Authenticator app. Microsoft has a support channel resource specific to certain different support scopes and attributes, that team has special expertise in queries related to the Authenticator app, so they can check and provide you with more details.Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!Best regards,Allen | Community Moderator