@thilinaillangasinghe

Thanks for reaching out to us.

You may use the incorrect endpoint. There are two versions of the authentication endpoints.

• Version 1: http://api.refinitiv.com/auth/oauth2/v1/
• Version 2: http://api.refinitiv.com/auth/oauth2/v2/

The authentication version 1 uses a machine Account (username, password, and App-Key) and supports password and refresh grant types. The authentication version 2 uses a service account (Client ID and Client Secret) and supports the client credentials grant type.

According to the error, I assume that you have a machine account for version 1 but you connect to the authentication version 2 endpoint.

Please check your credential if it is a machine account or a service account. If it is a machine account, use the authentication version 1 endpoint (tokenServiceUrlV1). If it is a service account, use the authentication version 2 endpoint (tokenServiceUrlV2).

For more information, please refer to the Getting Started with Version 2 Authentication for Refinitiv Real-Time: Overview article.

I hope that this information is of help.

Hello @thilinaillangasinghe

I am sorry to hear that you are facing the issue. To let me understand the problem better, please give me the following information.

• a version of EMA C++
• OS, platform information
• Which type of RTO credentials? Is it a Machine ID (GE-A-XXXXXXX-X-XXXX) or Service Account ID (GE-XXXXXXX)
• The snippet code that set the custom URL, set credentials (config.consumerName(...) and serviceDiscovery.registerClient(...))

I recommend you try the Cons450 example and see if the problem still persists.

If you are using a Machine ID account, the code needs to set RTO credentials with username (Machine ID), password, and App Key (aka client_id_v1):

serviceDiscovery.registerClient( ServiceEndpointDiscoveryOption().username( userName ).password( password )
    .clientId( clientId ).transport( transportProtocol ).takeExclusiveSignOnControl( takeExclusiveSignOnControl ), client );
    
config.consumerName( "Consumer_1" ).username( userName ).password( password )
    .clientId( clientId ).config( configDb ).takeExclusiveSignOnControl( takeExclusiveSignOnControl );

If you are using the Service Account ID, the code needs to set RTO credentials with client id and client secret:

serviceDiscovery.registerClient( ServiceEndpointDiscoveryOption().clientId( clientId ).clientSecret( clientSecret )
    .transport( transportProtocol ), client );
    
config.consumerName( "Consumer_1" ).clientId( clientId ).clientSecret( clientSecret )
    .config( configDb );

• Changes to Customer Access and Identity Management: Refinitiv Real-Time - Optimized
• EMA C++ API: Refinitiv Real-Time Optimized Version 2 Authentication Migration Guide

Thanks all. @Jirapongse 's response helped in my case.