NetSuite 2018.2 is in the final release stages and almost all accounts will be upgraded in the coming days.
2018.2 introduces 2 Factor Authentication for all Administrator and Full Access Roles. Please make sure you have set up your access correctly to continue using these roles and have the Authenticator App installed on your phones.
To see how to setup you can watch this short video below on how to complete the steps. You can also download the setup document HERE