Forum Discussion
Users cannot authenticate to file server
I have a domain that I recently took from a 2003 SBS environment and upgraded the domain to a 2022 DC. I am randomly getting users trying to connect to our file server via servername (\\servername\share) either a shortcut or mapped drive and they will get a credential request with the error "The system cannot contact a domain controller to service the authentication request". They can immediately address the server via IP and all works fine.
In the client event log i am finding Event 40960, LSA (LsaSrv) "The Security System detected an authentication error for the server cifs/servername. The failure code from authentication protocol Kerberos was "No authority could be contacted for authentication.
(0x80090311)"."
A client reboot will remedy the issue for a period of time.
Please run;
Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log (run on PDC emulator)
repadmin /showrepl >C:\repl.txt (run on **any** domain controller)
ipconfig /all > C:\%computername%.txt (run on **EVERY** domain controller)
ipconfig /all > C:\problemworkstation.txt (run on problem pc)
Also check the domain controller ***System*** and ***Replication*** (DFS or FRS) event logs for errors since last boot. Post the ***Event Source*** and ***Event IDs*** of any found. (no evtx files)
then put `unzipped` text files up on OneDrive and share a link.Mark_McElvy just checking if there's any progress or updates? please don't forget to mark helpful replies.
