Trusted connection using sqloledb

Connection string

This Microsoft OLE DB Provider for SQL Server connection string can be used for connections to SQL Server 2000 and SQL Server 7.0.

Provider=sqloledb;Data Source=myServerAddress;Initial Catalog=myDataBase;
Integrated Security=SSPI;

Use serverName\instanceName as Data Source to use a specific SQL Server instance. Please note that the multiple SQL Server instances feature is available only from SQL Server version 2000 and not in any previous versions.