Microsoft guidelines for sizing server specification for Windows Active Directory Domain Services (AD DS)
| Component | Estimates |
| Storage/Database Size | 40KB to 60KB for each user |
| RAM | Database Size
Base operating system recommendations Third-party applications |
| Network | 1 Gb |
| CPU | 1000 concurrent users for each core |
Link to Microsoft Article: http://social.technet.microsoft.com/wiki/contents/articles/14355.capacity-planning-for-active-directory-domain-services.aspx
Download in a word document Capacity Planning for Active Directory Domain Services