Hi Francis, Thank you for reaching out to us.
As per this guide , if your access to the customer account is through a manager account, this header is required and must be set to the customer ID of the manager account. To elaborate, if your OAuth2 credentials were generated using a user / email address associated to your manager account, you will need to specify that manager account's ID as the login-customer-id. Let me know how this goes on your end. Best regards, Heidi Google Ads API Team ref:_00D1U1174p._5004Q2ZIVvS:ref -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog: https://googleadsdeveloper.blogspot.com/ =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API and Google Ads API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com 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 "Google Ads API and AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/hHNPz000000000000000000000000000000000000000000000R9N4KZ00jFUkM2cZQ3WU3blpLCf0Kg%40sfdc.net.