Internal full qualified name request forward to tmg

Hi all,<o:p></o:p>

We have a TMG 2010, <o:p></o:p>

The Problem was our internal web application is not working when TMG is down. The scario was our domain isabc.ad, <o:p></o:p>

We access our internal web application byhttp://pa.abc.in, forabc.inwe have created DNS zone on Active Directory. But when we try to access the http://pa.abc.in the all the request forwarded to TMG. Internally the host was resolved through nslookup without issue. <o:p></o:p>

Please clarify where we need to check for  the issue, AD or DNS or TMG.<o:p></o:p>

Regards,<o:p></o:p>

Mariappan S<o:p></o:p>

Thanks, Mariappan Shanmugavel