getting postman error when calling a webservice - The server has rejected the client credentials

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Posted on by WF-14012240-0

In Postman - I have clientid, tenantid, secret values
I have retrieved an oauth token succesfully

but subsequent calls retyurn an arror example
https://api.businesscentral.dynamics.com/v2.0/{{oAuthTenantID}}/Sandbox/ODataV4/Company('CRONUS%20USA%2C%20Inc.')/companies

{"error":{"code":"Authentication_InvalidCredentials","message":"The server has rejected the client credentials. CorrelationId: fb65aa3e-99d6-459a-ae17-690b0ec1b7b7."}}

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Dynamics 365 general

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Muhammad Shahzad Sh... 2,373 Most Valuable Professional on at

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1. Expired Access Token
- OAuth tokens have a limited lifespan (typically 1 hour).
- Solution: Refresh the token before making subsequent calls.

2. Incorrect API URL Structure
- Ensure the URL follows the correct format:
https://api.businesscentral.dynamics.com/v2.0/{{tenantId}}/{{environmentName}}/api/...
- Common Mistake: Using `Sandbox` instead of the actual environment name.

3. Missing or Incorrect Scope in Token Request
- The token must include the correct scope (e.g., `https://api.businesscentral.dynamics.com/.default`).
- Postman Example:
{
      "grant_type": "client_credentials",
      "client_id": "{{clientId}}",
      "client_secret": "{{clientSecret}}",
      "scope": "https://api.businesscentral.dynamics.com/.default"
}

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Ramesh Kumar 7,527 Super User 2025 Season 2 on at

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Typically indicates an issue with the configuration of your Azure Active Directory (Azure AD) application or its permissions within Business Central. Assign Super your permission and try again.

https://yzhums.com/20690/?

https://learn.microsoft.com/en-us/answers/questions/401692/the-credentials-provided-are-incorrect-bc-oauth-2?

Thanks

Ramesh

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Jonas "Jones" Melgaard 4,980 Most Valuable Professional on at

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Moved to the SMC forum, since this is related to Business Central.

Do notice that blacking out text in the question text editor will not hide the text.

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YUN ZHU 95,681 Super User 2025 Season 2 on at

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Hi, It looks like you haven't added this app in BC's Microsoft Entra Application and given permissions.

You can check it first.

Thanks

ZHU

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Khushbu Rajvi. 20,441 Super User 2025 Season 2 on at

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Adding more: you should add the extension in permission.

https://yzhums.com/20690/

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Verified answer

Sohail Ahmed 11,148 Super User 2025 Season 2 on at

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You might be missing necessary permissions inside Business Central for the app you're using.

Here's how to fix it:

In Business Central, search for “Microsoft Entra Applications”.

Click New.

Enter your Application (client) ID and a name.

Under User Permissions, assign the following permissions:

D365 BASIC

SUPER (DATA) or other relevant permission sets based on your needs

This grants your registered Azure AD app the right access level inside BC.

📎 Find the attached screenshot for your reference.

Click Grant Consent (You must be an admin for this)

Once done, retry your request — it should authenticate correctly.

Mark below checkbox to make this answer Verified if it helps you.

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