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Editorial Team
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Asked: 2026-05-20T19:19:32+00:00

Our IT department recently moved from our databases to a cluster. This move broke

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Our IT department recently moved from our databases to a cluster. This move broke many legacy applications that enumerate the databases with the following code:

Dim objConn As ServerConnection
objConn = New ServerConnection()

If Me.ComboServers.Text.Trim.Length() > 0 Then
    objConn.ServerInstance = Me.ComboServers.Text.Trim()
End If


Me.SMOServer = New Server(objConn)
Me.ComboDatabases.Items.Clear()
For Each objDB As Database In Me.SMOServer.Databases
    Me.ComboDatabases.Items.Add(objDB.Name)
Next

This code works well enough when connecting to a standalone database but will not connect to a named instance on a SQL cluster.

How can I enumerate the databases on a named instance on a SQL cluster?

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1 Answer

  1. Editorial Team

    Discovery of named instances relies on SQL Server Browser Service. There is a known issue with the SQL Browser service and Windows Firewall that occurs on clusters. See Unable to connect to a SQL Server named instance on a cluster. There are specific updates to OS and SQL itself required to be applied, see the linked article for details. A good workaround is to use static ports and explicitly specify the listening port in the connection string(s).

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