The right single sign-on (SSO) solution will allow your users to securely log on once to access all their applications. This protects information, reduces password-related helpdesk calls, and improves employee satisfaction. But, not all SSO solutions are the same. As you start your evaluation process, it helps to know which questions to ask in order to have a thorough understanding of product features, implementation, and ongoing management. This list will guide you through your due diligence.