repadmin

A read-only Active Directory health check with a point-and-click interface. It wraps `dcdiag.exe`, `repadmin.exe`, `nltest.exe`, and `w32tm.exe`, plus a set of native directory checks, behind one window so you can pick exactly which tests to run and against which domain controllers.

PowerShell health checks for Active Directory and Windows Server: dcdiag, repadmin replication, FSMO, services, disk and pending reboot, with an HTML report and RMM-friendly exit codes

Field notes for troubleshooting Active Directory: dcdiag, repadmin, DNS/DC locator, sites, SYSVOL/DFSR, time, FSMO, Kerberos, Group Policy

PowerShell script for diagnosing, auditing, and monitoring Active Directory replication health across domain controllers.