SSO stands for single sign-on. It is essentially a service that centrally controls identities for a business, and it is available on Tradeshift for Enterprise Customers. 

Businesses choose SSO because it simplifies their lives. It allows them to maintain one set of credentials for their employees, where they can centrally manage all the information and applications you have access to. It also allows them to enforce two factor authentication, which is a security best-practice.

The Tradeshift login page is on the lookout for SSO enabled email addresses. When you type in an SSO enabled address, it hides the password field. Enter your company email and click the “Use single signon to sign in” button, after which you will be redirected to your SSO provider to go through the process.