The reason I am asking (before flagging the question)

https://serverfault.com/questions/404134/dns-issue-for-internal-website-routing-internet-connection-from-remote-location

got a comment from the OP 

>The problem is solved. ...  
>Turns out the previous admin had set up... 
>The problem was that he didn't integrate it with AD...

On AskUbuntu this question would be closed as *Off Topic* because 

>This describes a problem that can't be reproduced, that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers.