>>>>>>>
>>>>>>>You are right about the Agent.
>>>>>>>If SQL Server Express is installed on named instance (which is so) and not use port 1433, how do I find out what port is used? And how to I find out what is blocking user access to the SQL?
>>>>>>>Thank you.
>>>>>>
>>>>>>Ok, I found out (from Task Manager) the port on which SQL Server is listening. But still no solution to what is blocking it. The customer IT says there is no Firewall. But they do have Trend Micro AV but I don't know how to deal with it.
>>>>>
>>>>>How do you connect to SQL Server?
>>>>
>>>>ODBC from VFP 9 app using SQL server authentication. When I RDP to the server I can connect without any problem. But when a user runs the app from a desktop on their network the connection to SQL Server is blocked.
>>>
>>>
>>>Can you create a DSN connection from Control Panel->Administrative Tools->ODBC connections?
>>
>>Here is what the customer just reported to me:
>>
>>

>>NetEng has indicated that there is port level blocking on the vlan as well as the switches.
>>
>>They have found an issue with port 1433 and 1434 and are updating the access rule listing (ACL). This will take awhile, but hopefully will be done late this afternoon. I have asked NetEng to confirm completion.
>>

>
>
>You can configure SQL Server to listen different port.

I realize that. But all ports - it appeared - were being blocked. This morning they informed me that they (IT) found the problem and corrected it.
Thank you for your help!