You need some more troubleshooting methods for the domain logon
Windows writes a netlogon.log under %systemroot%\debug
When you need more information about clients with netlogon problems you should check the file %systemroot%\debug\netlogon.log. This file lists special problems with network clients. A few lines out of the log can be seen here:
12/07 14:17:51 NO_CLIENT_SITE: HHPC01 10.47.5.53
12/07 14:22:48 NO_CLIENT_SITE: HHPC01 10.47.5.53
12/07 14:35:42 NO_CLIENT_SITE: HHSRV02 10.47.8.5
In this case you can see that some pc's and even some servers have no site specification in active directory.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.