The POST /{{envID}}/saml20/sp/acs request supports an identity provider (IdP) initiated inbound single sign-on workflow. The post parameter in the request body includes a RelayState parameter containing the URL encoded application ID, and (optionally) the application URL.

The RelayState parameter needs to be in the URL-encoded format of applicationId=<your-appID>. For example: RelayState=applicationId%3D280686bb-cfca-4825-88a1-67dc1c89c73c, where “%3D” is the URL-encoded value for “=”, and “%26” is the URL-encoded value for “&”.