When you perform a full crawl, all content specified by the content source you are crawling is crawled, even if the content already exists in the index.
To start a full crawl of a particular content source
Important: You must be a shared services administrator to perform the following procedure.
To crawl content that is defined in a particular content source, take the following steps:
On the Search Administration page, under Crawl, click Content sources.
On the Manage Content Sources page, point to the content source you want to crawl, click the arrow that appears, and then click Start Full Crawl on the menu that appears.
Note: The value in the Status column changes to Crawling Full for the content source you selected in this step.
Repeat step 2 for each content source for which you want to do a full crawl.
Note: The value in the Status column on the page does not automatically change when the crawl is completed. To update the Status column, you must refresh the Manage Content Sources page by clicking Refresh.