Hallo, (Sorry, my German-speaking brain isn't creating thoughts at the moment. [:(]) I think you've eliminated everything that might be a block caused by the UTM. You didn't show us the topology, but I first would check to make sure the servers have a correct default gateway. If that's not it, then is the first server giving the phones the correct IP for the second server? MfG - Bob (Bitte auf Deutsch weiterhin.)
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