Hi,
Thanks for reaching out to the Google Ads API Team. I hope you are doing well today.
1. By using the CustomerService.CreateCustomerClient in the Google Ads API to create a sub-account under a specific manager account, does the relationship between the two accounts resemble the structure of linking the manager account with an existing client account using AccountLinkService.CreateAccountLink
>> With regards to this matter, we highly recommend to follow the Google Ads API documentation and guidelines, to avoid future errors. See below for reference.
2-1. If the relationship (structure) is the same, can the connection between the manager account and the created sub-account be severed using AccountLinkService.MutateAccountLink?
>> Please note that, The two services that are used to create a link between two accounts in the Google Ads API are the CustomerClientLinkService and the CustomerManagerLinkService. See Linking to Manager Accounts > Services (https://developers.google.com/google-ads/api/docs/account-management/linking-manager-accounts#services) for more information.
2-2. And is the separated sub-account independently usable, along with other client accounts?
>> Yes, know more about it in List Accessible Accounts https://developers.google.com/google-ads/api/docs/account-management/listing-accounts).
3-1. If the relationship is not the same, are there any other ways to disconnect the connection between the manager account and the sub-account created using CustomerService.CreateCustomerClient? Is the sub-account solely dependent on the manager account, without being separable and existing only in a dependent relationship with the manager account?
>> For this, I recommend checking the API documentation and guidelines of Managing User Access (https://developers.google.com/google-ads/api/docs/account-management/managing-users) and Get Account Hierarchy (https://developers.google.com/google-ads/api/docs/account-management/get-account-hierarchy).
Let us know how it goes on your end. Have a great day.
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Google Ads API Team |