One of the Domain Controller DNS entries pointing to wrong IP Address (resolving with the wrong IP address) which is affected Active Directory authentication and other services. This is a unique issue which I have come across It’s a single forest with multiple child domains as the architecture, when try to resolve one of the… Read More »
Force sysvol replication on windows server 2008/2012, FRS has been replaced by DFSR Replication engine for replicating the SYSVOL folders from Windows Server 2008 & wundows server 2012 and file replication performance has been improved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… Read More »
Find Duplicate SPN: A Service Principal Name (SPN) is a concept from Kerberos. To find a particular service offered by a particular host within the domain. General Syntax of SPNs is service class/fqdn@REALM , There are also User Principal Names which identify users, in form of user@Domain Kerberos requires that the SPN be unique and there should be a single SPN configured… Read More »
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… Read More »
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… Read More »
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… Read More »
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… Read More »
