Hi Dongliang, As per documentation <https://developers.google.com/adwords/api/docs/guides/accounts-overview#authentication>, the scenario you are trying to achieve should be possible by using the developer token of your root MCC account (100), the OAuth2 credentials of the root MCC account (100) or the sub MCC account (1001), and the clientCustomerId of the targeted client account (2001) in the request header.
To help us investigate further, could you provide to us the report definition <https://developers.google.com/adwords/api/docs/guides/reporting#create_a_report_definition> used and the generated report file from the AdWords API? Regards, Ivan AdWords API Team -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https://plus.google.com/+GoogleAdsDevelopers/posts =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Visit this group at https://groups.google.com/group/adwords-api. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/b2a0afcf-5917-4393-8252-75163f40f6bc%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
