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I am using SAML assertion to retrieve an OAuth token and I am using a custom apex class to generate the SAML assertion. My IDP is set to send User's FederationIdentitfier in Subject (SAML Response Pic), but in my Apex code where I am posting this SAML response to token end point, if I modify the SUBJECT to "4499", I am getting some timeout error.

Should the SUBJECT be User's 'username' only?

SAML Response

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Should the SUBJECT be User's 'username' only?

Yes, based on the documentation for OAuth 2.0 SAML Bearer Assertion Flow, this needs to be username (emphasis mine):

The Subject NameID must be the username of the desired Salesforce user.

  • Hey Jayant, thanks for answering my question. Actually I have 2 service provider orgs, SP1 and SP2 and I have obtained my SAML response from IDP into SP1. Now, in order to connect SP1 and SP2 I am using the oauth SAML response from SP1 and posting it to oAuth token end point (which is a connected app in SP2). Now, if I have to put user's username is the Subject (in SP1), then which user would that be SP1 user or SP2 user? because these 2 username's are different only the federationId is common. – ShruthiKy Apr 8 at 16:02
  • @ShruthiKy Comments are meant for follow ups on the question. But in this case, you have a completely different question in your comments. You should open this as a new question for someone to be able to help you on that specific issue. The answer here was specific to your original question based on the format of SFSE. – Jayant Das Apr 8 at 16:06

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