Generally not a problem if done occasionally, but doing it every day? Maybe. Whenever you power up a VFD, there is an associated inrush current that charges up the capacitors. To avoid damaging the rectifier components, they use what is called a "pre-charge" circuit. This is done in many different ways and often depends on the size. Small drives often use thermistors that are resistive when cool but drop to near zero resistance when they heat up a few seconds later. Some use a pre-charge resistor that is in series with the DC bus caps for a second or two, then shorted out of the circuit with a small contactor or a thermistor. Another method, frequently used on larger drives, is to use SCRs instead of diodes on the front end to ramp the DC voltage into the caps. If your drive uses a variant of the first two I described, powering it up every day can stress those resistive components and cause premature failure, i.e. the pre-charge resistor or thermistor cracks and burns out from thermal cycling stress and when it does, the caps fail shortly thereafter. But if your drive uses an SCR based rectifier, it may be fine. It's something you will have to ask of the Sq. D guys, although from the sounds of it, they are less than responsive. Good luck...
PS: a quick check of some service manuals I have on ATV66 and ATV71 Schneider drives indicates that they use the pre-charge resistor and contactor method. So I would be mildly concerned.
