Are you taking about VDA-FS? If so, that's an obsolete surface-only exchange standard that has since been superseded by STEP, which NX 7.5 does support.
in Germany you can buy a VDA interface directly from Siemens,it is an add-on.
I've attached th first pages of the user manuel os you can contact you local NX reseller.
And John, no VDA-FS isn't superseded by STEP. There are features included which STEP don't support.
VDA is for example popular for programming CMM machines, and of course for data translation with old fashioned CAD systems like EUCLID.
Production: NX10.0.3, TC 10.1.4
The site I checked stated that VDA-FS was superceded by STEP. That was all that I had to go by.
I have already recieved licence from Siemens for VDA export. But... Do you know where I can download necessary software (add-in etc)?
On the GTAC Download server go to "Full Product Download". If you're registered correctly you should get an additional tab "VDAFS" alongside with "NX/Unigraphics NX".