Question José Pereira · Dec 11, 2022 Can't get a valid access token in FHIR Server with OAuth2 Hi! I'm playing with OAuth2 with FHIR Server, but returned tokens cause 401 or 403 errors when trying to get FHIR resources. I tried using fhir-client.js and Postman. Access tokens returned have been failing for both, with a 401 when trying through fhir-client.js and a 403 using Postman. Here are my settings: #FHIR #OAuth2 #InterSystems IRIS for Health 0 0 0 360