As an IdP, you can specify to prompt end users to confirm their single logout requests and a default URL indicating a successful SLO to the end-user (if no other page is designated). On the IdP Default URL screen, you can also customize an error message to be displayed as part of the error page rendered in the end-user's browser if an error occurs during IdP-initiated SSO. For example, you might consider modifying the default text to include useful information regarding whom the user should contact or what their next step should be.
Note:

The error message is displayed only when the application calling the start-SSO endpoint does not explicitly provide its own error page URL. The default entry in this field is used to localize the message. For information about how to find and change the default English message and how use the PingFederate localization feature, see Localizing messages for end users. If localization is not needed, you may also specify a message directly in this field to change the default.

Your application or your partner's application may supply the URL at runtime (see IdP endpoints). However, if none is provided, PingFederate will use the default value you enter on this screen.
Tip:

If you leave the default URL blank, PingFederate provides built-in landing page for the user. This web page is among the templates you can modify with your own branding or other information (see Customizable user-facing screens).