Come si configura una connessione ADODB a SQL Server 2008 in Microsoft Access 2010?

Innanzitutto, è necessario assicurarsi che SQL Native Client sia installato. Riferimento

SQL Server 2008

Sicurezza standard

Provider=SQLNCLI10;Server=myServerAddress;Database=myDataBase;Uid=myUsername;
Pwd=myPassword;

Connessione affidabile

Provider=SQLNCLI10;Server=myServerAddress;Database=myDataBase;
Trusted_Connection=yes;

Connessione a un'istanza di SQL Server La sintassi per specificare l'istanza del server nel valore della chiave del server è la stessa per tutte le stringhe di connessione per SQL Server.

Provider=SQLNCLI10;Server=myServerName\theInstanceName;Database=myDataBase;
Trusted_Connection=yes;

Fonte

Dim conn As New ADODB.Connection
Dim cmd As New ADODB.Command
Dim sConnString As String
Dim recordsAffected as Long

'Create connection string
sConnString = "Provider=sqloledb; Server=LAPTOPX; Database=HomeSQL; Trusted_Connection=True;"

'Open connection and execute
conn.Open sConnString

'Do your query
With cmd
  .ActiveConnection = conn
  .CommandType = adCmdText
  .CommandText = "Select ...;"
  .Execute recordsAffected 'Includes a return parameter to capture the number of records affected
End With

Debug.Print recordsAffected 'Check whether any records were inserted

'Clean up
If CBool(conn.State And adStateOpen) Then conn.Close
Set cmd = Nothing
Set conn = Nothing