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Published Jun. 30, 2025

The screen name cannot be an email address or a reserved word

Written By

Sivakumar Perumal

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Issue

  • When trying to log in with an Active Directory user, sign-in failed with the below error 
    ERROR [http-nio-8080-exec-9][BaseSamlStrutsAction:59] Screen name test@liferay.com for user 34945 must validate with com.liferay.portal.kernel.security.auth.DefaultScreenNameValidator: The screen name cannot be an email address or a reserved word, such as postfix. It must contain only alphanumeric or the following special characters: -._.

Environment

  • Liferay DXP 7.0 to 7.4

Resolution

  • The above error will be observed when the screen name is mapped to an email address. Checking the attribute mapping should help.
  • Also, since Liferay will allow only the following special characters by default the authentication will not be successful as the email address consists of a special character. 
    #
    # Input a list of special characters that are allowed in screen names. This
    # property is read by the default screen name validator implementation.
    # Custom implementations need to also use this property to account for
    # screen names with special characters.
    #
    # Env: LIFERAY_USERS_PERIOD_SCREEN_PERIOD_NAME_PERIOD_SPECIAL_PERIOD_CHARACTERS
    #
    users.screen.name.special.characters=-._

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