In a computer system, some resources may be protected within an SSO environment, and other resources may be protected in an alternate authentication environment. A user logged into an alternate authentication environment will again be prompted for login credentials when accessing an SSO protected resource. To avoid additional login prompts, credentials authenticated by the alternate authentication environment are used by the SSO environment to identify the user. The credentials are collected from the alternate authentication environment and provided to the SSO resource in the form of a ticket. The SSO resource forwards the ticket to an SSO provider. The SSO provider identifies the user within a user store using the credentials in the ticket. If the SSO provider identifies the user, the SSO provider generates a token and provides the token to the SSO resource. The token is authenticated by the SSO resource and access is granted to the user.