Hi - I'm i a similar position to the OP, we've bought a cc2014 individual licence but I work in a government organisation with proxy server and strong firewall and we can't download even the desktop manager. When I spoke to support they said it was unlikely I'd be able to get it to work through our system, and even if we upgraded to a teams licence we'd still have a problem as the indidual computers would still need a clean connection through to the adobe servers to activate.
The document linked only talks about the Packager and the Teams/Enterprise licence, so is there just no solution for anyone with a single licence that has to work via a proxy server? Would a Teams licence solve these problems?