Granular Recovery Technology (GRT) lets you restore individual objects and attributes from Active Directory and ADAM/AD LDS backups without performing an authoritative or non-authoritative full restore. To restore individual items, you must enable the Granular Recovery Technology feature when you create a backup job. You should review the requirements for a GRT-enabled backup before you configure it.
More Information
How to restore individual items by using Granular Recovery Technology
Recommended devices for backups that use Granular Recovery Technology
About requirements for jobs that use Granular Recovery Technology