This OLE DB Provider is provided by Microsoft.
Include "Provider=MSIDXS" in the connection string to use this provider.
The Microsoft OLE DB Provider for Microsoft Indexing Service provides programmatic read-only access to file system and Web data indexed by Microsoft Indexing Service. ADO applications can issue SQL queries to retrieve content and file property information. The provider is free-threaded and unicode enabled.
More info about this provider can be found at the Microsoft product page.
There is no 'OLE DB Provider for Index Server' installation package to download. (if you know about an installation package URL you can contribute to the community by submitting the info to us through this message form)
The OLE DB Provider for Index Server provider can be used to connect to the following data sources by using the following connection string references: