I have recently re-built our WDM server (w2k8 r2) IIS 7.5.
Install went fine, however only a third of our 1700 devices (mixture of C30 and S30) have been discoverable. I have set up DHCP flags for 186 with new ip address and 192 0x50,0).
The undiscovered terminals seem to be unable to overwrite the old WDM server IP adress in the control panel, when this is manually change the device becomes discoverable. Manually changing over 1000 terminals across the UK is not an option for us as all are in varying geographical locations.
Previously WDM 4.7.2 worked perfectly, however due to a Domain change the new server build was unavoidable.