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Cannot connect to named SQL Server 2005 Express instances Expand / Collapse
Posted Tuesday, March 20, 2012 6:06 AM


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I have a user that I installed SQL Server 2005 SP4 Standard Edition on their new server. They have since created three SQL Server 2005 Express named instance. They can connect to the default instance that I created using SQL Server 2005 SSMS from their workstation, but they are unable to connect to any of the named Express instances. I can connect to all instances from the server. Please advise as to a solution. Thank you in advance.

Post #1269470
Posted Tuesday, March 20, 2012 6:17 AM



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tI'd check for three things:
1. Make sure the SQL Broswer service is running. That is the Service that handles the part of the connection when you request machinename\Instance1 , it tells the service which dynamic port that service is using (ie 1711).Remember the Express by default will be using dynamic ports.

2. Next, Express, by default, does not allow remote have to explicitly enable it.

3. Windows Firewall will prevent connections unless you tel it otherwise. after you make sure of the two steps above, turn off windows firewall, and tryu to connect froma remote machine. If you can connect, then you know you need to change windows fireall to allow the three express instances to connect.


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Post #1269479
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