A SharePoint deployment includes the content source described in the following table. Content source: Intranet site Crawl frequency requirements: When a new document or page is added You need to confi

Adding an index server increases search capacity and redundancy but does not change how frequently or automatically content is crawled.

Resetting the search index deletes all existing indexed content and forces a full recrawl, which would negatively impact availability and search results during reindexing.

Continuous crawling in SharePoint Server incrementally processes content changes at frequent, automatic intervals (defaulting to every 15 minutes), ensuring new documents and pages are indexed shortly after being added. Unlike scheduled incremental crawls, it does not require administrator intervention and spreads crawl load over time, reducing the risk of resource spikes that could impact farm availability.

A daily incremental crawl does not meet the requirement of indexing content when it is added, resulting in significant delays before new documents appear in search results.

A 30-minute incremental crawl is a manual schedule that still introduces indexing lag and does not react to content additions automatically, unlike continuous crawling.

On-demand crawling requires an administrator to manually trigger the crawl each time, making it unsuitable for automatically indexing newly added content.