[Action Required] Management of Admin SDK API access is being migrated to OAuth permissions

On Friday, June 7, 2019, 12:34:35 AM EDT, The G Suite Team [email protected] wrote:
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Hello Administrator,
We are writing to let you know about a change to how admins can choose to enable or disable API access to the Admin SDK from June 30, 2019.
What’s changing?
Admin SDK API access is currently enabled through the Admin console under Security → API Reference. The checkbox in this section of the Admin console currently enables or disables access to the Admin SDK.
In order to consolidate access to all APIs, on June 30, 2019, we are moving this setting to Security → API Permissions → Admin. We have worked to ensure that this change does not disrupt any applications you may already have which rely on the Admin SDK.
Currently, if you have API access disabled, but OAuth applications enabled for the Admin SDK or service accounts with admin scopes granted, the OAuth applications and service accounts are not able to use the Admin SDK. After June 30, if you have this configuration, OAuth applications and service accounts will be able to use the Admin SDK.
What do I need to do?
If you have API access disabled, please review your OAuth applications and service accounts to decide if they should remain enabled, before June 30.
You can review service accounts which have been granted admin scopes at Security → Advanced Settings → Manage API client access.
We’re here to help
If you have additional questions or need assistance, please contact Google support and provide the following reference number: 131116599.
The G Suite Team
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