Exception is thrown in acquireTokenByClientCredential if authority ends with /consumers when use personal tenant account

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Core Library

MSAL Node (@azure/msal-node)

Core Library Version

3.1.0

Wrapper Library

Not Applicable

Wrapper Library Version

None

Public or Confidential Client?

Confidential

Description

Hello!
The issue "Exception is thrown in acquireTokenByClientCredential if tenantId is missing #5805" added a check for legal tenantId values ​​(prohibiting the case where the value is consumers). However, when the azure application option is only for individual tenants, tenantId (parse from the end of authority) may be consumers, as mentioned in the official nodejs (server) usage sample. Therefore, writing this in the current version will produce an exception without tenantId, which is not expected.

Error Message

D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:861
return new ClientAuthError(errorCode, additionalMessage);
^

ClientAuthError: missing_tenant_id_error: A tenant id - not common, organizations, or consumers - must be specified when using the client_credentials flow.
at createClientAuthError (D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:861:12)
at ConfidentialClientApplication.acquireTokenByClientCredential (D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:11616:19)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
errorCode: 'missing_tenant_id_error',
errorMessage: 'A tenant id - not common, organizations, or consumers - must be specified when using the client_credentials flow.',
subError: ''
Node.js v20.15.1

MSAL Logs

[Fri, 24 Jan 2025 13:07:47 GMT] : [] : @azure/msal-node@3.1.0 : Info - acquireTokenByClientCredential called
[Fri, 24 Jan 2025 13:07:47 GMT] : [] : @azure/msal-node@3.1.0 : Verbose - initializeRequestScopes called
D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:861
return new ClientAuthError(errorCode, additionalMessage);
^

ClientAuthError: missing_tenant_id_error: A tenant id - not common, organizations, or consumers - must be specified when using the client_credentials flow.
at createClientAuthError (D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:861:12)
at ConfidentialClientApplication.acquireTokenByClientCredential (D:\Projects\Webstorm\untitled\node_modules@azure\msal-node\lib\msal-node.cjs:11616:19)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
errorCode: 'missing_tenant_id_error',
errorMessage: 'A tenant id - not common, organizations, or consumers - must be specified when using the client_credentials flow.',
subError: ''
Node.js v20.15.1

Network Trace (Preferrably Fiddler)

• Sent
• Pending

MSAL Configuration

{
    auth: {
        clientId: "clientId",
        authority: "https://login.microsoftonline.com/consumers",
        clientSecret: "clientSecret"
    }
}

Relevant Code Snippets

const msal = require('@azure/msal-node');

const msalConfig = {
    auth: {
        clientId: "clientId",
        authority: "https://login.microsoftonline.com/consumers",
        clientSecret: "clientSecret"
    },
    system: {
        loggerOptions: {
            loggerCallback(loglevel, message, containsPii) {
                console.log(message);
            },
            piiLoggingEnabled: false,
            logLevel: msal.LogLevel.Verbose,
        }
    }
};

const cca = new msal.ConfidentialClientApplication(msalConfig);

const tokenRequest = {
    scopes: [ 'https://graph.microsoft.com/.default' ],
};

cca.acquireTokenByClientCredential(tokenRequest).then(res => {
    console.log(res)
})

Reproduction Steps

1. Use the "Relevant Code Snippets" above.
2. Install the latest "@azure/msal-node".
3. Replace the clientId and clientSecret with your own.
4. Run the code;

Expected Behavior

Like the version below 2.0. It will not throw an error. It will send the request and print the response successfully.

Identity Provider

Entra ID (formerly Azure AD) / MSA

Browsers Affected (Select all that apply)

None (Server)

Regression

@azure/msal-node 2.0.0