HTTP 503 token endpoint response

Fred 0 Reputation points
2025-03-21T09:03:59.69+00:00

I am trying to make my OpenID Connect relying party (RP) implementation work with Microsoft Entra ID as OpenID Provider(OP). The redirection to the authorization enpoint works. The OP returns a Authorization Code. But when the RP HTTP POST this code to the token endpoint, it returns a 503 HTTP status without more information than this one : "No server is available to handle this request."

So, it does not return an OAuth2.0. specific error which would be useful.

Note, that this RP implementation works with another OP.

Microsoft Security | Microsoft Entra | Microsoft Entra External ID
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