# Turning on multi-account search
<a name="manage-service-multi-account"></a>

With multi-account search, you can search for resources across accounts with active indexes in your AWS Organizations or organizational unit (OU).

**Topics**
+ [Prerequisites](#getting-started-prerequisites)
+ [Enable multi-account search](#enable-multi-account-search)
+ [Multi-account Quick Setup](#getting-started-quick-setup)
+ [Effect of account actions on Resource Explorer multi-account search](manage-service-account-actions.md)

## Prerequisites
<a name="getting-started-prerequisites"></a>

To turn on multi-account search for your organization, complete the following: 
+ For [opt-in Regions](https://docs.aws.amazon.com/resource-explorer/latest/userguide/opt-in-region-considerations), verify your management account is also opted-in where you are turning on multi-account search. 
+ [Create an administrative user.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/getting-started-setting-up-prereqs.html#create-an-admin)
+ [Create a service-linked role in the administrator account](https://docs.aws.amazon.com/resource-explorer/latest/userguide/security_iam_service-linked-roles.html) with `aws iam create-service-linked-role --aws-service-name resource-explorer-2.amazonaws.com`.
+ [Enable trusted access in AWS Organizations](https://docs.aws.amazon.com/organizations/latest/userguide/orgs_integrate_services.html). This allows full integration with Resource Explorer to list resources across all accounts in your organization.
+ Assign a delegated administrator (*recommended*). For more information, see [ Delegated administrator for AWS services that work with Organizations](https://docs.aws.amazon.com/organizations/latest/userguide/orgs_integrate_delegated_admin.html) in the *AWS Organizations User Guide*.
  + Resource Explorer supports only 1 delegated administrator who performs similar actions to the management account.
  + Removing or changing the delegated administrator for your organization results in the removal of all multi-account views created in their account.

## Enable multi-account search
<a name="enable-multi-account-search"></a>

To search and discover resources across your organization's accounts, you must complete the following steps:

1. [Activate AWS Resource Explorer in one or more accounts in your AWS Organizations.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/getting-started-setting-up.html)

1. [Register one Region to contain the aggregator index.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/manage-aggregator-region.html)

1. [Choose a Region in which to create an aggregator index. This Region must be consistent across your AWS Organizations.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/configure-views.html)

1. [Create a Resource Explorer view that's scoped to your AWS Organizations or organizational unit. Create this view in the aggregator Region from the preceding step.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/configure-views-create.html)

1. [Share the view with accounts across your organization.](https://docs.aws.amazon.com/resource-explorer/latest/userguide/configure-views-share.html)

## Multi-account Quick Setup
<a name="getting-started-quick-setup"></a>

Enable Resource Explorer across multiple accounts in your organization with the Quick Setup.

**Note**  
This process does not deploy any resources in the management account. If you are using the management account and you want indexes in the account, you must manually add them with the Resource Explorer onboarding flow.

1. Navigate to [Quick Setup](https://console.aws.amazon.com/systems-manager/quick-setup/create-configuration?configurationType=AWSQuickSetupType-ResourceExplorer) for Resource Explorer in the Systems Manager console.

1. Choose your **Aggregator index Region**. This allows you to search for resources located in all Regions in the selected target accounts. If any of the selected target accounts already have an aggregator index configured in another Region, the existing aggregator index will be automatically replaced with this new Region.

1. Choose your account **Targets**. You can enable Resource Explorer for your entire organization or for specific organizational units (OUs).
**Note**  
You can deploy to a maximum of 50,000 AWS CloudFormation stacks at a time. If you have a large organization that spans multiple Regions, you should deploy at the OU level in smaller batches.

1. Read through the summary of acknowledgements before you choose **Create**.