Well if you use the wizard to set up the DAP and get it connected. You should be able to connect to it with your client device and get services thru it. Might check the user manual for any information on this when in extender mode. There may not be a way to do any configurations in extender mode since it relies upon an gets it's wireless information from the main host router and passes the signal and such on to the connecting devices. 
Thanks for your input but it is clear that you do not have specific experience with or knowledge of this device. If I use a windows system that supports .local addressing then I can connect to the dap-1320 and finish the setup configuration after it initially connects to the selected wifi network and gets its new IP address.
What I am asking for is advice on how to accomplish the same goal on an android device that does not support .local addressing. I need to figure out what IP address has been assigned to the DAP by whatever router it has connected to. I know this is going to be difficult as I have been trying to figure it out for more than a month with no success.
This is probably an issue that dlink will need to address in a future firmware update. The dap probably needs to identify itself to all devices that connect to its extended wifi network as the primary gateway rather than allowing the original networks gateway to be listed.
There has to be a way to identify the dap IP on the extended network. I don't need configuration or setup help, I know what I'm doing and the dap is working as expected, it's just that when I use an android device I cannot access the setup UI without an IP address that I can't figure out how to determine. I don't really want to travel with an extra windows laptop just to configure the extender.