Direct Access Server 2012 - Internal and External Domains are the Same

Hi,

I am currently implementing direct access on our network, historically (and rather annoyingly our internal domain is the same as our external domain)

As an example, I have purchased a secure certificate to connect to da.domain.com and set up the relevant A Record however when my laptop is away from the network I am unable to connect to Direct Access as it has taken control of any requests to domain.com therefore I can't resolve da.domain.com and as a result I can't connect. I have tried specifically adding that host to my host file but to no avail, I can not access anything with the domain.com domain.

I have found a domain article that deals with exactly the same issues here http://social.technet.microsoft.com/Forums/forefront/en-US/28e71d05-2b49-40f7-9212-e178dc594555/internal-and-external-domain-name-are-identical-now-what however it is for an older version of Direct Access (I think) and I can't find the same options. I have tried changing a few things to replicate the forums suggestion but had no luck, has anyone here got the same setup working and if so can you advise what settings you changed?

Kind Regards

David