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Eventid 40960 : The failure code from authentication protocol Kerberos was "No authority could be contacted for authentication from Workstation

Anonymous
2020-12-15T23:51:22+00:00

Hi Team,

We are experiencing the event id 40960 from half of our  Windows 10 workstations - ( These workstations are spread across different sites ) . Though the sites were having local domain controller before , due to some issues , these local  DC's were removed  and now the  workstation from these sites are connected to the main  domain controller. 

"The failure code from authentication protocol Kerberos was "No authority could be contacted for authentication from couple of site Workstation"

The user can log on to the workstation , but unable to get the mapped drives workings , GPO not getting applied etc.

Even if we browse from these workstation to any of the DC's "netlogon" folder , it is prompting for the user name and password.

Have tried the following and still could not get the issue resolved  - 

DCDIAG - no error reported from the DC's ( two DC's are the main site) - Windows 2016 DC's

nltest - no error

dns - no error

etc

Removed the WS and added back to the domain 

Checked the MTU Size and no fragmentation at all 

Ran out of idea and hit the wall -- please help

Windows for home | Windows 10 | Security and privacy

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  1. Anonymous
    2020-12-16T02:31:21+00:00

    Hello Ranjith,

    There's nothing to apologize and to worry. It's okay.

    You're welcome. Stay safe and have a great day!

    Sincerely,

    John DeV

    Independent Advisor

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  2. Anonymous
    2020-12-16T02:17:02+00:00

    Thanks John ,

    Sorry Accidentally , have posted in the same forum again so please remove both the posts from this site

    Regards

    RK

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  3. Anonymous
    2020-12-15T23:54:06+00:00

    Hello Ranjith,

    I'm John an Independent Advisor and a Microsoft user like you. I'll be happy to assist you today.

    Since this is a consumer forum for Home users, I would recommend to post your query on our sister forum Microsoft Site QA in Server 2016 section which is a technical community platform where most of the members were IT professionals that would greatly help you with the issue. They have IT experts there that can assist you better especially about Windows Servers, Active directory and Group Policy configurations, etc.

    Microsoft Site QA

    https://docs.microsoft.com/en-us/answers/index....

    Windows Server 2016

    https://docs.microsoft.com/en-us/answers/topics...

    Sincerely,

    John DeV

    Independent Advisor

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