Only some of the settings configured on the Login Security screen in Users & system administration apply to guest accounts.
For information about the settings on the Login Security screen, refer to the following page.
Default values of 'Login Security'

The following settings are applied to guest accounts in addition to regular user accounts.

• Minimum Number of Characters for the User Password
• Password Complexity
• Login Name as Password
• Password expiration
• Password Reuse Limit

• Session expiration time

The following settings are not applied to guest accounts.

Only regular user accounts can access cybozu.com using single sign-on with SAML authentication.

Guest accounts cannot use two-factor authentication.

The following settings are not applied to guest accounts.

• Self-service Change
  Guest users can change their password even if this setting is not enabled.
• Force Password Change
  Even if this setting is enabled, guest users will not be asked to change their password the next time they log in.
• Self-service Reset
  Guest users can reset their password even if this setting is not enabled.

Guest users will not be locked out of their account even if they exceed the number of failed login attempts allowed.

Even if a message is set, it will not be displayed when a guest user fails to login.

The Streamline Login Process settings are not applied to guest accounts.

This setting is not applied to guest accounts because they cannot use Client Certificate Authentication.