Before you can configure the SharePoint Object Model crawl, you must install a SharePoint solution on the SharePoint server. This task is not required if you are using the SharePoint Web Services crawl.
The IAS installation redistributes a SharePoint solution. The SharePoint solution contains an agent (a SOAP Web service assembly) that allows the crawl to communicate with the SharePoint server.
To install the SharePoint solution:
The installation program copies the files and deploys the crawl to all members of the selected SharePoint farm.
After installation, you can verify that the SharePoint solution has been correctly deployed to the server, or server farm, by connecting to SharePoint Central Administration, clicking the Operations tab, then selecting Solution management in the Global Configuration section.