Finally, Microsoft did it : Active Directory Replication Status Tool

One of Active Directory's strengths is its distributed nature. Since its architecture is spread across multiple domain controllers (DCs), AD scales extremely well and is highly fault tolerant to domain controller errors. However, the highly sophisticated replication engine that keeps AD data consistent across all these DCs is dependent on many other systems such as basic network topology, firewall configurations, and DNS. Active Directory topics are the highest call volume generator for Microsoft's Customer Support Services, and replication failures generate among the highest call volumes within the AD support area.

ReplMon was one of the common tools that was used to monitor and analyze replication patterns within AD infrastructure so an admin can figure where the errors were originated and hence proceed with fixing.

Although ReplMon was a useful tool  Microsoft replaced it with the command line RepAdmin tool with the release of Windows Server 2008.

Opposite to the GUI tool ( ReplMon ) , the command line tool RepAdmin was not as easy for use for most admins with its multiple switches and parameters.

In order to make AD admins life easier , Microsoft – finally - released Active Directory Replication Status ( ADREPLSTATUS ) tool .

This tool (ADREPLSTATUS) analyzes the replication status for domain controllers in an Active Directory domain or forest. ADREPLSTATUS displays data in a format that is similar to REPADMIN /SHOWREPL * /CSV imported into Excel but with significant enhancements.

Specific capabilities for this tool include:

• Expose Active Directory replication errors occurring in a domain or forest

• Prioritize errors that need to be resolved in order to avoid the creation of lingering objects in Active Directory forests

• Help administrators and support professionals resolve replication errors by linking to Active Directory replication troubleshooting content on Microsoft TechNet

• Allow replication data to be exported to source or destination domain administrators or support professionals for offline analysis

This tool can be installed on a Varity of Windows OS versions :

• Windows Client :  XP , Vista , 7 of course Windows 8 
• Windows Server : 2003 , 2008 , 2008 R2 and of course Windows 2012

The monitoring support is extended  of the following DCs OS versions :

• Windows Server 2003
• Windows Server 2003 R2
• Windows Server 2008
• Windows Server 2008 R2 and Windows Server 2012 Release Preview ( RC )

You can get the 5.1 MB binaries from here