Okta Authentication Setup Guide

Prerequisites

Admin permissions in AWS to create the identity provider and the roles.
An Okta account at Okta (https://www.okta.com)
Permission to access to Timestream

Steps

Sign in to the Okta Admin dashboard: https://<company domain name>-admin.okta.com/admin/apps/active
Select Browse App Catalog and search for AWS Account Federation.
Open AWS Account Federation and click Add Integration.
Change Your AWS Login URL to the appropriate URL, e.g. https://console.aws.amazon.com/console/home?region=us-west-2.
Click Next.
Select SAML 2.0 as Sign on methods. Click View Setup Instructions, a new window with setup instructions will be popped up.
Follow CONNECT OKTA TO A SINGLE AWS INSTANCE to setup SAML with Okta.

TroubleShooting

Fail to login to AWS by clicking AWS Account Federation.

One possible reason is user is not assigned SAML roles. Go to Assignments tab in application AWS Account Federation. Click the pencil icon to edit user assignment. Ensure correct role is selected for SAML User Roles. If no Role or SAML User Roles is seen, check Provisioning tab to ensure Create Users and Update User Attributes are enabled.
No SAMLResponse field in the SAML Assertion response returned from Okta when using Timestream ODBC driver.

Go to Sign On tab in application AWS Account Federation. Scroll down to the bottom. Check Authentication policy under section User authentication. Make sure it is Password only.