Extracted from a current DAZ licence agreement:

"User does not have the right to pfrovide the 3-D Model(s) to others in any form or on any media." (sic)*

"...provided that you may not in any case: (a) separately publish, market, distribute, transfer, sell or sublicense any 3-D Model(s) or any part thereof; "*

In other words, your friend was not entitled to give you his collection.