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Secure Channel Broken - continuation of "The trust relationship between this workstation and the primary domain failed."

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While there can be several reasons for AD replication to fail due to an "access denied" error (you may find more information in KB article 2002013 - Troubleshooting AD Replication error 5: Access is denied https://support.microsoft.com/kb/2002013/EN-US),
in here we will be focusing on broken secure channel issues on Domain Controllers and how to reset them.
Then as promised in my previous post we will also have a look at tools/commands you may use to verify and reset secure channels and trusts.

A replication issue may actually be the cause for a broken secure channel between DCs in the first place.
Another common cause may be restoring from backup a DC to a previous point in time (or to a system restore point in case of client machines) or time jumps which don't cause the broken secure channel directly but may seen be as a colateral damage.
(by the way take a look at https://blogs.technet.com/b/askpfeplat/archive/2012/11/19/did-your-active-directory-domain-time-just-jump-to-the-year-2000.aspx and https://blogs.technet.com/b/askpfeplat/archive/2012/11/26/fixing-when-your-domain-traveled-back-in-time-the-great-system-time-rollback-to-the-year-2000.aspx
which have been updated recently).

To reset the Secure Channel of a Domain Controller you have 2 methods, one requires reboot the other doesn't however requires more tasks to be completed.

If restarting the DC is an issue for you due to business, availability or change control requirements do the following:

1. Set the Kerberos Key Distribution Center (KDC) service startup type to Disabled, and restart the domain controller
(particularly important if you have more than one DC on the same domain, so this way you will force the affected DC to contact another DC for kerberos authentication, instead of using itself)

2. Once the DC restarts, reset the secure channel:

netdom resetpwd /server: /userd:\ /passwordd:*
(you should get the foolowing message: "The machine account password for the local machine has been successfully reset")

3. Then, set the startup type for the KDC service back to Automatic and restart the DC once again.

Note: Do not start the service manually as it will be started automatically during reboot.

The 2nd way is:

1. Delete any mapped drives that might exist on the affected DC, for that run:

net use * /d

2. Stop the KDC service.

3. Purge all kerberos tickets from the computer credentials cache (this is the memory space were the computer stores its tickets, there's nothing in common with cached credentials).

Depending on the Operating System run the following:

On Windows Server 2003:

at /interactive cmd.exe
(check current system time and add a couple of extra minutes, for example if current time is 14:14 type 14:16)

Note:
Another command prompt will launch under the System account context (SVCHost.exe )on the Console session of the problem DC at the time you entered (14:16 in the example above).
If running the command via RDP ensure that you are connected to session 0 (mstsc /console or /admin depending on mstsc version) or you won't be able to see the 2nd command prompt.

klist purge

On Windows Server 2008 or above:

klist -li 0x3e7 purge

Note:

The -li 0x3e7 gets klist into the computer credentials cache so there's no need for the "at" command.

4. Reset the Secure Channel:

netdom resetpwd /server: /userd:\ /passwordd:*
(You should get the following message "The machine account password for the local machine has been successfully reset"

 
net use \\\IPC$
(The DC will request new kerberos tickets)

5. Force the DC to replicate from/to the PDCemulator (so both ways first inbound then outbound):

repadmin /replicate <destination> <source> <NC> /force

example:
repadmin /replicate DC1 DC2 DC=Contoso,DC=com /force
(you should get the following message "sync from DC2 (the PDCe) to DC1 (the affected DC) completed successfully")
repadmin /replicate DC2 DC1 DC=Contoso,DC=com /force
(you should get the following message "sync from DC1 (the affected DC) to DC2 (the PDCe) completed successfully")

Note:
If the affected DC successfully replicates from the PDCe then start the KDC service. If not successful, you will have to use the method the requires restart.
If replication to the PDCe fails, delete the old outbound connection object and trigger KCC (repadmin /kcc) in order to rebuild them, and force outbound replication again. (this might be required for COs with other replication partners)

Done.

In order to verify the health status of secure channels you may use Nltest.exe or Netdom.exe (which is also used for trusts).

If using Nltest run:

Nltest /sc_verify:<DomainName>
You should get "Trust Verification Status = 0 0x0 NERR_Success" if not you must reset the secure channel.

Note:
This command doesn't work on a PDCe, so please don't reset the PDCe secure channel once you run it thus getting an error message.
Don't use /sc_query to verify secure channels because it doesn't verify the SC, it just tells you the information about the last established SC. (so you will get a valid answer even when you cannot reach a DC)

If using Netdom:

netdom verify /domain:<DomainName>

In order to verify Trusts:
(Trusts work in a similar way as Secure Channels, there is a TDO (Trust Domain Object) maintained in each trusting and trusted domain partition, which password has to be in sync, of not the trust gets broken).

netdom trust /Domain: /verify

Note:
Please take into account that depending on security settings between domains this command may fail, for more troubleshooting information see the article below:
Client, service, and program issues can occur if you change security settings and user rights assignments
https://support.microsoft.com/kb/823659

Hope it has been useful for you. Feel free to share your thoughts.

Comments

  • Anonymous
    January 01, 2003
    Hi, every now and than this information is very useful - thanks for sharing

  • Anonymous
    January 01, 2003
    Try to use netdom reset with cred and server paramenters or netdom resetpwd, if your issue continue try on Microsoft Foruns.

  • Anonymous
    February 17, 2013
    My problem is not with a DC, its with a Certificate Authority, I have reset the computer account in my Server 2012 Domain controller ADUC-, however I cannot login.  I can login only with a local account where I then try the powershell Test-ComputerSecureChannel -Repair ... but i get access is denied.  A more secure authentication method is required for this computer.  I tried nltest /SC_RESET but get similar error.  Now the problem is I have reset the computer account password on the domain controllers, but the certificate authority does not know that it needs a new password.  Any ideas how to solve this one.  I cannot leave the domain and rejoin obviously because it is a CA.  In the past I have had this problem solved by going back to a snapshot, but this time I have already reset the password so I'm stuck.

  • Anonymous
    July 20, 2013
    Hi did you ever resolve the problem with you CA ? I have the exact same issue and can not reset the secure channel.

  • Anonymous
    March 15, 2014
    The comment has been removed

  • Anonymous
    March 15, 2014
    The comment has been removed

  • Anonymous
    May 19, 2014
    The comment has been removed

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    How To Stop A Divorce And Save Your Marriage?(Dr.Brave).

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  • Anonymous
    June 04, 2014

    How To Stop A Divorce And Save Your Marriage?(Dr.Brave).

    Hello to every one out here, am here to share the unexpected miracle that happened to me three days ago, My name is Jeffrey Dowling,i live in TEXAS,USA.and I`m happily married to a lovely and caring wife,with two kids A very big problem occurred in my family seven months ago,between me and my wife so terrible that she took the case to court for a divorce she said that she never wanted to stay with me again,and that she did not love me anymore So she packed out of my house and made me and my children passed through severe pain. I tried all my possible means to get her back,after much begging,but all to no avail and she confirmed it that she has made her decision,and she never wanted to see me again. So on one evening,as i was coming back from work,i met an old friend of mine who asked of my wife So i explained every thing to her,so she told me that the only way i can get my wife back,is to visit a spell caster,because it has really worked for her too So i never believed in spell,but i had no other choice,than to follow her advice. Then she gave me the email address of the spell caster whom she visited.(bravespellcaster@gmail.com}, So the next morning,i sent a mail to the address she gave to me,and the spell caster assured me that i will get my wife back the next day what an amazing statement!! I never believed,so he spoke with me,and told me everything that i need to do. Then the next morning, So surprisingly, my wife who did not call me for the past seven {7}months,gave me a call to inform me that she was coming back So Amazing!! So that was how she came back that same day,with lots of love and joy,and she apologized for her mistake,and for the pain she caused me and my children. Then from that day,our relationship was now stronger than how it were before,by the help of a spell caster . So, i will advice you out there to kindly email this wonderful man {bravespellcaster@gmail.com},i f you are in any condition like this,or you have any problem related to "bringing your ex back. So thanks to Dr Brave for bringing back my wife,and brought great joy to my family once again.{bravespellcaster@gmail.com} , Thanks..