Enabling GuardDuty via Organisations

Question

I would like to enable GuardDuty via Organisations, and would like to know whether the existing member accounts on the main administrative account (by invitation) switch to 'enabled via Organisations' automatically. 
Also, can I designate a GuardDuty administrator account from outside the organisation (being from a separate organisation).

Accepted Answer

If you have already set up a GuardDuty administrator with associated member accounts by invitation, and the member accounts are part of the same organization, their **Type** changes from **by Invitation** to **via Organizations** when you set a GuardDuty delegated administrator for your organization.

If the new delegated administrator previously added members by invitation that are not part of the same organization, their **Type** is **by Invitation**. In both cases, these previously added accounts are member accounts to the organization's GuardDuty delegated administrator.

You *cannot* designate an account outside of your organization as a GuardDuty administrator account.

Answer

You cannot delegate Admin to an account outside of your organization as it uses Org based roles for access across the accounts.

You can find more information about enabling org wide integration in the AWS docs: https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_organizations.html

Enabling GuardDuty via Organisations

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