Not AD, but DNS could.

If your machine uses one set of DNS servers and the QA server uses another set, then yes you could potentially have a mismatch of DNS entries.

Speak to your network guys/server admins, to find out if your DNS servers differ from your QA servers, and if they do find out what MyServer they both want to connect to.

Edit: Also check for entries in yours and the servers host files, which will bypass DNS and send the connection somewhere else