Hi Werner,
Good day as well and thank you for reaching out to our API support team.
You can instead directly query all the ad groups belonging to your account using the
ad_group report. You should also be able to filter using the
campaign.id field.
Once you acquire the details of the ad group such as the ad group's
resource_name, you may then use those to update the bid or other attributes of the ad group using the
AdGroupService.
Examples on retrieving a report can be found
here, while examples of updating an ad group can then be found
here. I hope this helps.
Best regards,
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| Peter Laurence Napa Oliquino |
| Google Ads API Team |
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