When you create an API Certificate to link your Apple Search Ads Account with SearchAdsHQ, you select the Campaign Group and assign Group Manager role to it. This step may be confusing because you see the word Account at this step.

When you select Limited Access and click on the selector, you see all the Campaign Groups you have in this Ad Account.

Note that you can include a few Campaign Groups into one certificate.

Note that Read Only certificates are not supported.

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