Before you can use the Amazon Lex V2 integration in Genesys Cloud, you must enable the AWS STS regional endpoint for your organization’s region. For many regions, this endpoint is enabled by default. If the endpoint is not enabled for your region, then for information about how to enable it, see Regions and endpoints in the AWS Identity and Access Management user guide. 

To access the Call Lex V2 Bot action in Architect, first add and configure the Amazon Lex V2 integration and then grant permission to access AWS resources in your org. 

1. Click Menu > IT and Integrations > Integrations.
2. Click Add Integration.
3. Locate the Amazon Lex V2 integration.
   Note: If the Amazon Lex V2 integration does not appear in the list of integrations, in the Search box type Amazon Lex V2 .
4. In the Amazon V2 Lex tile, click Install. Genesys Cloud installs the integration.
5. Click Integrations.
6. Next to Amazon Lex V2, click More  and select Edit Integration.
7. Click the Configuration tab.
8. Click the Credentials tab.
9. Click Configure. The Change Credentials dialog prompts you for the customer AWS role that Genesys Cloud is authorized to access.
10. Type Ctrl+V to paste the ARN you stored on the Clipboard into the Role ARN box. If you use a Mac, type Command+V to paste. 
    Note: This role is the ARN that you copied to the Clipboard while performing the Configure IAM role with permissions for Amazon Lex V2 app procedure.
11. Click OK.
12. On the Advanced tab, define the AWS regions in which to look for Amazon Lex V2 bots. By default, this setting is {}, and Genesys Cloud searches only for the current region. However, you can, for example, specify the following:
    {
"regions": [
"us-east-1",
"us-west-2"
]
} With this configuration, Genesys Cloud searches the us-east-1 and us-east-2 regions.
13. Click Save.
14. Select the Details tab.
15. To activate the integration, click Inactive. The Change Status dialog appears and asks you to confirm that you want to activate Amazon Lex.
16. Click Yes. The status changes to Active.