A family of Microsoft on-premises document management and storage systems.
Hi anonymous user,
You could migrate search administration database to bring the crawl rules and custom managed properties to the new farm. The search administration database stores search configuration data, such as the topology, crawl rules, query rules, and the mappings between crawled and managed properties. Your custom managed properties
and crawl rules will be still displayed in search admin center after migration.
For Reference: Search Application Service Migrate or Start Fresh
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