Yes Horizon VDI's can reach the internet, I've also confirmed with Microsoft and our Firewall team the correct URL's required for activation are allowed through. No errors, simply says "unlicensed" at the top of the office apps. The difference I noticed between a horizon VDI and just a Vcenter one is that when I open Office in Horizon VDI, I get prompted for my e-mail only, then nothing happens. On the Vcenter one I get prompted for my e-mail, then my password, and a third window saying "Use this account everywhere on your device" once I see those 2 extra windows I know Office will activate.
