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Single sign-on (SSO) is an authentication capability that lets users access multiple applications with one set of sign-in credentials. Enterprises typically use SSO to provide simpler access to a variety of web, on-premises, and cloud apps for a better user experience. It can also give IT more control over user access, reduce password-related help desk calls, and improve security and compliance. Today, applications are deployed across data centers and clouds, and being delivered as SaaS. Every business application requires users to be authenticated before they are given access to a resource. In the pre-SSO days, every time a user needed to move between applications, they had to sign in with a set of credentials. Most of the time, every application had a separate set of credentials, and it resulted in poor user experience, failed sign-ins as a result of forgotten credentials, inconsistent access control policies, and higher cost to support these applications. SSO has simplified the way users interact with and access their applications. With SSO, users can save time by accessing all their VDI, enterprise, web and SaaS applications, as well as other corporate resources like network file shares with only one set of credentials.