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Hi I am trying to use SSO to authenticate my client's users directly to my website. My client's IDP is Microsoft ADFS and I am using Passport-SAML (https://github.com/bergie/passport-saml) to configure the SSO process.

After getting to a special URL I give my client (example: www.myClient.myCompany.com ), the user (unauthenticated) is as expected redirected to the client login page. After he enters his credential, he remains stuck in login page BUT the SSO work because the user is authenticated meaning that if he opens a new tab and go to www.myClient.myCompany.com, he will be redirected to my website.

Here the error in ADFS Server Log:

The Federation Service encountered an error while processing the SAML authentication request. 

Additional Data 
Exception details: 
Microsoft.IdentityModel.Protocols.XmlSignature.SignatureVerificationFailedException: MSIS0038: SAML Message has wrong signature. Issuer: 'www.myCompany.co'.
   at Microsoft.IdentityServer.Protocols.Saml.Contract.SamlContractUtility.CreateSamlMessage(MSISSamlBindingMessage message)
   at Microsoft.IdentityServer.Service.SamlProtocol.SamlProtocolService.Issue(IssueRequest issueRequest)
   at Microsoft.IdentityServer.Service.SamlProtocol.SamlProtocolService.ProcessRequest(Message requestMessage)

MSIS0038 Error - Event ID 303

Thank for your time!

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