## Zoho Billing - Product, solutions, integrations, support, and resources Index Access the complete documentation index at: https://www.zoho.com/qa/billing/llms.txt Use this file to discover all available documentation pages before proceeding. [Back](./) # What is Single Sign-On (SSO)? Single Sign-On (SSO) is an authentication method that allows users to sign in to applications using a single set of login credentials. Instead of remembering different usernames and passwords for each app, users can log in once through a trusted Identity Provider (IdP) and get seamless access to all connected services. Learn how you can [set up Single Sign-On](/billing/help/settings/customer-portal-sso/customer-portal-sso.html) for your Zoho Billing organization.