https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132043#M32213 <P>This can be caused by a rotation in the certificate(s) used by the IDP to sign the SAML response. I would consider re-exchanging the metadata between your IDP and Portal or more specifically you could compare the 'Certificate' value in your current SAML settings in Portal to what is contained within the SAML assertion using a tool like saml-tracer (browser extension).</P> Mon, 10 Jan 2022 15:24:15 GMT ChristopherPawlyszyn 2022-01-10T15:24:15Z https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132004#M32212 <P>We've had our Enterprise deployment in place for several months and have been using it without any issues.</P><P>This morning the users started receiving the message Unable to login using Idp. Unable to validate SAML response error message.</P><P>How do I resolve this?</P> Mon, 10 Jan 2022 13:56:42 GMT https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132004#M32212 Anonymous User 2022-01-10T13:56:42Z https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132043#M32213 <P>This can be caused by a rotation in the certificate(s) used by the IDP to sign the SAML response. I would consider re-exchanging the metadata between your IDP and Portal or more specifically you could compare the 'Certificate' value in your current SAML settings in Portal to what is contained within the SAML assertion using a tool like saml-tracer (browser extension).</P> Mon, 10 Jan 2022 15:24:15 GMT https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132043#M32213 ChristopherPawlyszyn 2022-01-10T15:24:15Z https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132089#M32214 <P>Thank you for your reply. I've passed that information along to our network services team.</P> Mon, 10 Jan 2022 17:13:03 GMT https://community.esri.com/t5/arcgis-enterprise-questions/unable-to-login-using-idp-unable-to-validate-saml/m-p/1132089#M32214 Anonymous User 2022-01-10T17:13:03Z