Active Directory Health Check
Active Directory helpful Command Events View Check event log in all DCs to find everything ok specifically DNS, system and Application events. Dcdiag.exe This is a must and will always tell you if there is trouble with DCs and/or services associated with it Netdiag.exe This will let me know if there are issues with the networking portion on the DC. Netsh dhcp show server This command identify DHCP in in AD infrastructure. Repadmin /showreps This shows all replication among DCs. repadmin /replsum /errorsonly reapadmin /syncall /AdeP This will identify any issues with replication among DCs. Active Directory DNS Check Dnslint /ad domain_controller_ip_address /s dns_server_ip_address Reference ..