'Something went wrong. 5ssai.

Solución que me funcionó:

Para resolver el problema, configuré la cuenta de correo directamente en el administrador de cuentas integrado del dispositivo (en mi caso, un teléfono Xiaomi con MIUI). Después de realizar esta configuración, abrí sesión de manera normal en las distintas aplicaciones asociadas, como Outlook, OneDrive, Edge y Microsoft Authenticator, y el error dejó de aparecer.

Posibles razones por las que esto funcionó:

1. Sincronización nativa del sistema: El administrador de cuentas del dispositivo puede gestionar mejor los permisos y la autenticación en segundo plano.
2. Evitar conflictos entre apps: Al configurar primero la cuenta en el sistema, se reduce la posibilidad de errores de autenticación en aplicaciones individuales.
3. Actualización automática de credenciales: Algunos dispositivos actualizan automáticamente los tokens de acceso, lo que puede solucionar errores de inicio de sesión.

Recomendación adicional:
Si el problema persiste, verifica que la hora y fecha del dispositivo estén configuradas correctamente, ya que un desfase puede afectar la autenticación.

Gracias Luis.

This method worked. Although Microsoft Authenticator would not populate a code to match, I clicked "use other method" and selected text. Worked like a charm after that. MSA sucks!

exactly what happened with me.

I missed an appointment today I knew was in my calendar and then discovered the calendars were not synching SOOOOOOOOOOOOOOOOOOOOOOOOOOOO annoying.

Now I cannot get my regular outlook calendar back on my phone

Guys,

I found the solution. I think that Microsoft screwed with the 2FA and this has caused Android devices to be untrusted and that a trust relationship must be reestablished in order for the new Auth procedures to work. Typical Microsoft whoopsie. Mass production not validating and testing their code prior to deploying to the public..

Pre-Requisite. Microsoft Authenticator is installed on your device and that your Outlook account is linked to it

Remove the Errant account from the list of accounts in Outlook and the Native Email app

1. On your Android device.

• Go to Settings
• Apps
• Look for Outlook
• Click Storage
• Click "Clear Cache on the bottom righthand side of the screen.
• Open a web browser and navigate to outlook.office.com
• Enter your email and your password.
• Authenticator will then go thru its 2FA method and ask for the Auth number as displayed on the sign in. Enter the

number displayed

You should now see why the error came up. Your device is not a trusted device and a question will be asked..Trust the device? Click Yes

and once everything is lined up, you will see the Welcome to Copilot and your webmail.

• Now open your Outlook app and re-add the errant account.

Click Add account

select O365

Enter the email account

Enter the password

Outlook will now re-add the email account successfully.

• Now do the same thing with your Native Mail app

Everything should now work.

If after this, your email is still showing that 5ssai error then consult with your provider ot Systems Administrator for further analysis but this solution should help you guys out.

Thank you!!! This was the ONLY solution that fixed the problem for me. Your method forced Microsoft to re-trust my device, whereas the other ways were merely just the usual "technical support" generic answers that did nothing to resolve the actual issue.