Hi DaNial,
Thank you for reaching out to our API support team.
The process you described of
retrieving the manager/MCC's hierarchy first then generating a report per returned client account is already correct and the only way via the API to generate reports for all client accounts under a manager/MCC.
That being said, if your MCC's hierarchy contains a significant number of accounts then generation of reports should be expected to take longer than usual, depending as well on the volume being retrieved per client account.
Best regards,
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| Peter Laurence Napa Oliquino |
| Google Ads API Team |
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