AWS internal DNS

Hi Guys

We are on the enterprise edition and i am currently trying to internal AWS dns names to resolve when connected to the vpn
i have put the aws dns server as the primary in the server settings 169.254.169.253 but it just breaks the dns completely for everyone, what am i missing?

When using the AWS DNS server the client DNS mapping option must also be enabled. This will proxy DNS requests through the Pritunl server. This option requires an enterprise subscription.