public void setManagementAccountId(String managementAccountId) {
        this.managementAccountId = managementAccountId;
    }
<p>
The ID of the management account that's connected to the environment account connection.
</p>

@param managementAccountId
       The ID of the management account that's connected to the environment account connection.
aws-java-sdk-proton/src/main/java/com/amazonaws/services/proton/model/EnvironmentAccountConnection.java