I would think the problem would be on the server EXCEPT the fact that I can connect from my machine just fine, so it can't be the server it has to be something on the developer machines (but then why wouldn't the VM work if it's a fresh install?) Windows firewall is turned off on both client and server. The sql server listening port has been changed on all sql servers and we are using alias's in sql server config manager on our machines to connect. I even tried installing the SQL Management Studio 圆4 (downloaded it today) fresh with no other SQL server installations on a new VM and was still unable to connect to the 2008 R2 sql server at our data center. We have all installed SQL server 2008 r2 and SP1.

We have no problem connecting to any of the 2005 sql servers and in fact on my computer I (sys admin) am able to connect successfully to the 2008 R2 sql server but none of our 4 developers can connect. We have a site-to-site VPN setup between the 2 locations so no ports or anything are being blocked. We are trying to connect via Management Studio to the 2008 R2 sql server but are getting the attached error message. At the Data center we have multiple sql servers (20 R2). We have 2 locations.main location and a colocation at our data center.

Sql management studio 2008 r2 ports