AuthenticationError.CLIENT_CUSTOMER_ID_IS_REQUIRED - AdGroupService

[Nicola Hall]

From April 10, our calls to the AdGroupService started to fail with the error "AuthenticationError.CLIENT_CUSTOMER_ID_IS_REQUIRED'. I have verified that our code has not changed and that our clientCustomerId is set on our requests. We are calling version 201802 of the AdWords API - endpoint: https://adwords.google.com/api/adwords/cm/v201802/AdGroupService . 

Could you confirm if something has changed that we need to address or if this is an issue being dealt with?

Thank you.

[Milind Sankeshware (AdWords API Team)]

Hi Nicola,

We had an issue which is now fixed. Are you still getting this error? If so, could you please share the SOAP request and response log for the "AuthenticationError.CLIENT_CUSTOMER_ID_IS_REQUIRED' error along with client customer id, so that I can troubleshoot the issue? You could use 'Reply Privately to author' option while responding.

Thanks,
Milind, AdWords API Team.

[Nicola Hall]

Sandbox testing looks good this morning - thanks. Will monitor the live report for any ongoing issues.