Managing digital signature settings defines the private key you will use to sign single sign-on (SSO) authentication or attribute requests (optionally) or SAML 2.0 single logout (SLO) messages for this identity provider (IdP).
This process allows you to include Key Info with the XML message if you and your partner have agreed to this option.
Digital signing applies to service provider (SP)-initiated SSO under SAML 2.0, when specified by your partner agreement, and to either SLO profile using the POST or redirect bindings. Digital signing also applies if you are configuring an Attribute Query profile and have specified that you will sign attribute requests.
The step is not required for SAML 1.x IdP connections.