You can remove this post if you would like but I resolved the issue. I will explain what I did.
After installing Avast on the workstation, go to Settings>Troubleshooting
At the bottom, enter the IP of the server that your Avast Small Office Admin is located on.
Verify that the 23522 port if open on the server's firewall.
Refresh your Avast Small Office Admin console, it can take a few minutes to find that workstation.