Hi Mark,
Thanks for posting your concern.
Could you confirm if you are referring to
email_address field of
CustomerService.CreateCustomerClient request? If yes, then this field is for allowlisted customers only. If you wish to learn if you would be eligible for the allowlist, I would recommend that you reach out to your Google manager or representative, for further guidance. I hope this helps.
Let me know if you have further questions.
Regards,
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| Ernie John Blanca Tacata |
| Google Ads API Team |
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