Category Archives: Active Directory Troubleshooting

Force DFS Replication/Force DFSR Members to Replicate on windows server 2008 and 2012

Force sysvol replication on windows server 2008/2012, FRS has been replaced by DFSR Replication engine for replicating the SYSVOL folders from Windows Server 2008 & wundows server 2012 and file replication performance has been improved with many new features, Microsoft manage to fix most of the bottlenecks, improved command line support, Content Freshness, handling unexpected … [Continue reading]

How secure channel determine the Domain controller in cross-forest

How client computer/member server find the logon Domain Controller from Cress Fores in an Active Directory envirnment or How secure channel determine the Domain controller in cross-forest

If you are worked on troubleshooting the authentication issues between forests, you might be used NLTEST tool to check the secure channel Domain controller, did you ever try to know how the domain … [Continue reading]

Domain Controller failed test Machineaccount on DCDIAG

Domain Controller failed test Machineaccount

While you run a DCDIAG command on Domain Controller which failed with bellow error, will discuss how to find the issue and solution to fix the issue

Starting test: MachineAccount

* DC Name is not a server trust account

* DC Name is not trusted for account delegation

……………………. DC Name failed test MachineAccount

Issue … [Continue reading]

AD Slow Authentication and prompting for credentials again and again

AD Slow Authentication and prompting for credentials again and again (Active directory Troubleshooting – Part 2)
It’s a most common issue in a complicated Active Directory environment, before am going to discuss about the authentication issues, I would like to discuss about the Active Directory basics like Pass through authentication, AD secure channel, NTLM and Kerberos

Active directory Troubleshooting (Part1 – Diagnostics Logging)

How do I find what is accessing my LDAP Server and what LDAP query used and how many queries for a period of time?
Troubleshooting Active Directory issues like authentication failures, performance issues and logon issues, we can use different methods to monitor the AD, I will discuss more about enabling diagnostics logging, adding related counters on performance monitor to … [Continue reading]