GS752TXS DHCP Helper address

[mchipser]

I am trying to configure my stack of GS752TXS to use one DHCP server across 3 VLANs. I don't see an option to add a DHCP helper address. I read on a review a user was also unable to find this but used a workaround by trunking the port with the DHCP server. I tried this but my DHCP server still did not provide addresses to items outside of the PVID. I then contacted Netgear support and they said I needed to trunk it to a PVID not on a VLAN like 99. This did not work either. Anyone know how to work around this?