# Document history
<a name="doc-history"></a>

The following table describes significant changes to this guide.


| 
| 
| **Change** | **Description** | **Date** | 
| --- |--- |--- |
| Update | In the [Managing the configuration of AWS resources](config-mgmt.md) section, added information about the service-linked configuration aggregator (SLCA) in landing zone versions 4.0 and later. | November 20, 2025 | 
| Update | Added information about managing AWS Config costs in the [Managing the configuration of AWS resources](config-mgmt.md) section. | April 2, 2025 | 
| New section | Added information about [managing the configuration of AWS resources](config-mgmt.md); updated AWS Direct Connect details in the [Networking integration](networking.md) section. | December 6, 2024 | 
| Major update | Significant changes and additions to all sections of the guide. | March 25, 2024 | 
| Update | Updated with the latest details on AWS Control Tower controls. | November 17, 2022 | 
| Initial publication | — | September 10, 2021 |