Change the aws:connect:systemEndpoint value based on a contact attribute

To change the outbound call number based on a contact attribute in Amazon Connect, you can use the dynamic outbound caller ID feature. Here's how you can set this up:

1. Create an outbound whisper contact flow:

   • Navigate to the contact flow page in your Amazon Connect instance.
   • Create a new outbound whisper flow or modify an existing one.

2. Use the "Call phone number" block:

   • In your outbound whisper flow, add a "Call phone number" block.
   • This block allows you to specify a custom caller ID number.

3. Set up dynamic caller ID:

   • You can use an attribute to dynamically set the caller ID number.
   • The attribute can be defined in a "Set contact attributes" block or returned from an AWS Lambda function.

4. Use Lambda for complex logic (optional):

   • If you need to look up customer data or apply complex logic, you can use an "Invoke AWS Lambda function" block.
   • The Lambda function can set an attribute based on customer data, such as location or account type.

5. Configure the "Call phone number" block:

   • In the "Call phone number" block, use the attribute set by your flow or Lambda function to determine the caller ID.
   • Ensure the attribute value is a phone number from your instance in E.164 format.

6. Important considerations:

   • The phone number must be claimed or ported to your Amazon Connect instance.
   • If the number is not in E.164 format, the system will fall back to the queue's default outbound caller ID.
   • Ensure your agents have the necessary permissions to make outbound calls in their security profile.