# Walkthroughs {% hint style="info" %} This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-control-tower-guide.git) {% endhint %} ## Walkthrough: Automate Account Provisioning in AWS Control Tower by Service Catalog APIs * **Note**\ You also can adapt this approach for automating account updates, by calling the API of AWS Service Catalog for each account. You can write a script to update the accounts, one by one. * **Note**\ Notice that the format of the input string for the value of `ManagedOrganizationalUnit` has changed from `OU_NAME` to `OU_NAME (OU_ID)`. The video that follows does not mention this change. ## Walkthrough: Configure AWS Control Tower Without a VPC * **Important**\ If you provision Account Factory accounts with VPC internet access settings enabled, that Account Factory setting overrides the control [Disallow internet access for an Amazon VPC instance managed by a customer](https://github.com/kevinslin/aws-reference-notes/blob/main/services/aws_control_tower/data-residency-controls.md#disallow-vpc-internet-access). To avoid enabling internet access for newly provisioned accounts, you must change the setting in Account Factory. ## Walkthrough: Decommission an AWS Control Tower Landing Zone * **Important**\ We strongly recommend that you perform this decommissioning process only if you intend to stop using your landing zone. It is not possible to re-create your existing landing zone after you've decommissioned it. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://awsnotes.dendron.so/management-and-governance/aws-control-tower/topics/walkthroughs.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.