The SAML ID used in requests for authentication and verification (provided by your SAML 2.0 provider)
SalesForce Connected App Example
OKTA SAML Integration
For an OKTA SAML 2.0 application, this URL is found from either the initial definition or editing and is accessed from the Sign-On Tab, like the SAML 2.0 Issuer URL for Authenticating :
The Issuer Identifier is the Identity Provider Issuer value
