A customer have changed ther phone number for 2 way authentication.
so the customer does not recieve a sms code.
the way to deal with this is to reset the the contact details on the user.
Resolution:
Login to your office 365 portal
Go to users
Klik active users
Click the collum “Multi-Factor autentifikation”
![](https://harddrive.dk/wp-content/uploads/2019/10/Sk25C325A6rmbillede2B2019-10-102B08.53.27.png)
Click manage users settings
![](https://harddrive.dk/wp-content/uploads/2019/10/quick_steps.png)
Click “Require selected users to provide contact methods again”
![](https://harddrive.dk/wp-content/uploads/2019/10/reset_multi_factor_auth.png)