What causes GetOAuth2AccessTokenErrorResponse?

OAuth2 access token request failed. Integration runtime configuration is incorrect or outdated. Authentication credentials or permissions are insufficient. The feature or setting is not supported for the selected connector or copy mode

How do I fix GetOAuth2AccessTokenErrorResponse?

Read the OAuth2 error response in the activity run output — the authorization server returns a specific error code (e.g., 'invalid_client', 'unauthorized_client', 'invalid_grant') that identifies the exact problem.. Open the linked service in ADF Studio and verify the client ID, client secret, and token endpoint URL are correct — a single transposed character in the client ID or secret causes this error.. Check whether the client secret has expired in Azure AD — go to Azure AD > App registrations > the relevant app > Certificates & secrets and verify the expiry date.. If the error is 'unauthorized_client', confirm the application has the necessary API permissions granted and admin consent has been provided in Azure AD.. Test the linked service connection using 'Test connection' in ADF Studio after updating any credentials — this validates the token acquisition before the next pipeline run.

Medium severityauthentication

Power BI Refresh Error:
GetOAuth2AccessTokenErrorResponse

What does this error mean?

The OAuth2 authorization server returned an error response when ADF attempted to acquire an access token. The credentials or OAuth2 endpoint configuration in the linked service is incorrect.

Common causes

1OAuth2 access token request failed
2Integration runtime configuration is incorrect or outdated
3Authentication credentials or permissions are insufficient
4The feature or setting is not supported for the selected connector or copy mode

How to fix it

1Read the OAuth2 error response in the activity run output — the authorization server returns a specific error code (e.g., 'invalid_client', 'unauthorized_client', 'invalid_grant') that identifies the exact problem.
2Open the linked service in ADF Studio and verify the client ID, client secret, and token endpoint URL are correct — a single transposed character in the client ID or secret causes this error.
3Check whether the client secret has expired in Azure AD — go to Azure AD > App registrations > the relevant app > Certificates & secrets and verify the expiry date.
4If the error is 'unauthorized_client', confirm the application has the necessary API permissions granted and admin consent has been provided in Azure AD.
5Test the linked service connection using 'Test connection' in ADF Studio after updating any credentials — this validates the token acquisition before the next pipeline run.

Frequently asked questions

Who needs to take action to fix an authentication failure in ADF?

Typically the pipeline owner (to re-authorize OAuth or update credentials) or an Azure AD admin (to re-enable a disabled service principal or reset a Conditional Access block). The error message indicates which identity is failing.

Can a Conditional Access policy cause ADF authentication failures?

Yes — Conditional Access policies requiring MFA or blocking non-compliant devices can affect ADF service principals. Check Azure AD sign-in logs for the service principal to identify the blocking policy.

Does ADF support managed identities to avoid credential management?

Yes — ADF supports system-assigned and user-assigned managed identities for many connectors (Azure SQL, Blob Storage, Key Vault, etc.). Managed identities use token-based authentication with no credentials to rotate or expire.

How long does it take for a new service principal secret to take effect in ADF?

After updating the secret in the ADF linked service and saving, the next pipeline run immediately uses the new credential. There is no propagation delay.

Official documentation: https://learn.microsoft.com/en-us/azure/data-factory/connector-troubleshoot-guide