Partial enrollment of accounts
When you're working with baselines, an account can be placed into a state called Partially enrolled.
This state can occur if you re-register an OU by calling the
ResetEnabledBaseline API, because AWS Control Tower applies only the mandatory
resources to the accounts in the target OU. An account that is missing the optional
resources (controls) for its parent OU is marked as Partially
enrolled.
If you move an unenrolled account into a registered OU and then call the
ResetEnabledBaseline API on the OU to enroll that account, AWS Control Tower
applies the resources associated with the AWSControlTowerBaseline to the
newly-enrolled account. However, optional controls enabled for this OU are not applied
to the account. The account remains in a Partially enrolled
state.
To enroll the account fully, choose Re-register or Update account in the console. When you select these operations from the console, AWS Control Tower applies all of the resources of that OU to the newly-enrolled account, including the optional controls that are activated for that OU.