To be able to explore and recover necessary database using a desired restore scenario, you should have a transactionally-consistent backup of your Active Directory Domain Services server created successfully. For that, you should enable application-aware image processing and specify application-specific settings as described in the Veeam Backup & Replication User Guide for the corresponding platform.
You may also find useful information in the following topics:
- Backing Up a Domain Controller - the series of post in the Veeam corporate blog
- Active Directory Backup & Recovery with Veeam - a technical white paper (currently available for v8)