Posted in Sapiosexual ADFS 1021 error – MSIS9422: Received invalid OAuth JWT Bearer request July 27, 2025 Microsoft.IdentityServer.Web.Protocols.OAuth.Exceptions.OAuthInvalidGrantException: MSIS9422: Received invalid OAuth JWT Bearer request. The certificate used to sign JWT Bearer request is not from a registered device. https://stackoverflow.com/questions/58322985/adfs-1021-error-msis9422-received-invalid-oauth-jwt-bearer-request