I have a user whose OneDrive for Business sync client offers the wrong organization when login for sync client is needed. The wrong organization's login is federated, and it cannot be changed on the login screen. The device has been connected to the wrong organization earlier (I guess accidentally by the user), but is now moved and joined to the company's Azure AD. All accounts referring to the wrong organization are removed.
After re-install sync client worked correctly, until the next time it needed to log in again.