Thank you for your response. I already have QB database server installed and configured as needed for sharing company files, I have no problem here. Although even with Database manager installed and functional. I still cannot communicate with remote intuit server for license sync.
To clarify I have experience with quickbooks software, firewall and multi-user configurations. This however is the first time I have seen the software unable to communicate with the intuit servers. Again this works just fine if I connect the computers directly to ISP modem.
So its either a setting on the firewall or router that is causing the block. I just need to know what to look for, a port that QB uses outside the usual 8019, a specific IP address? This way i can perform more tests to fully open communication.