I posted back in 2008 about a Microsoft article that speaks to the maximum limits for Active Directory. Microsoft has updated their content to include Active Directory in Windows Server 2012. Specific updates include:
- Increase in the number of RIDs that can be allocated over the lifetime of a domain with Windows Server 2012
- Update regarding the maximum number of objects to reflect garbage collection batch size, which is 5000.
The new content can be found here.