A domain controller is a server in a Microsoft Active Directory or NT4 domain that is responsible for central authentication.

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Windows server 2012R2 as additional domain controller along with Server 2008R2 fails

On running ADPrep passes all prerequisite, but fails in the last stage with the below error: ADPrep execution failed --> System.ComponentModel.Win32Exception (0x80004005): A device attached to ...
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repair exchange after removing domain controller

I had exchange 2010 installed on a domain controller {same host} (I know). I installed a second domain controller on the domain removed the DC installed on the same machine as exchange 2010. This is ...
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Consolidating Domains from 2 UPN's to 1

We currently have 1 domain (no children) at corp.domain.com. We have an alternate UPN so that users can have their UPN as username@domain.com (no corp). Many of our earlier users however have the ...
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263 views

Session limit exceeded on domain controller?

I have a Server 2003 machine that runs a number of scheduled tasks as a particular domain user. Every couple of weeks, the user seems to lose its home directory (normally C:\documents and ...
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50 views

Domain time drifting with VM DCs / host domain members

I'm following the advice given in this article: ...
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92 views

Active Directory Mismatch

I have a Active Directory Mistmatch how do I fix this? I have 2 x 2008 R2 Domain Controllers and a 2008 Domain Controller and I was trying to add a 2012 R2 Domain Controller. The Schema Version of ...
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73 views

Sysvol Replication issue

I have read a lot about this recently and must say it is doing my head in. now what I did was 6 months ago we did a upgrade of our infrastructure. We had a 2008 R2 server for domain controller now I ...
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25 views

Will the timezone be converted across geographical areas?

I'm using Active directory in Windows server 2008 R2. My domain is in a particular timezone and my client say X is in another timezone. Now I have implemented certain restrictions that X cannot logon ...
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63 views

how do i test my DC backups

I have several system state backups of my domain controller 2008r2 stored on a network location. I am wanting to build a test environment so I can practice recovering a domain controller and also to ...
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94 views

Limiting users to logging onto Samba domain only from specific machines

I have Samba setup and running nicely as a primary domain controller with roaming profiles. Currently users can log on to the domain controller from any machine in the network. However, I want to ...
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71 views

Install DC again after removing on exchange server

I had a DC and Exchange 2010 installed on the same machine. I removed the DC role, and Exchange server went crazy. I tried to install the DC role again to fix the problem but ran into this error when ...
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99 views

Websites (IIS 7.0) unavailable from Internet upon rebooting 1 out of 4 DCs

What happened: We had to reboot one of our Domain Controller (DC), located on the VLAN 1 for maintenance purpose. We have a total of 4 DCs on 3 VLANs, so we thought that wouldn't affect our ...
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AD Replication Errors / KCC - Between two Domain Controllers

I'm having quite an issue that began a few days ago. Let me just lay out exactly what happened - also I've inherited this environment, please keep that in mind. 1st Domain Controller - Windows ...
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524 views

Install Forefront Threat Management Gateway on Domain controller

I have a problem on installing Forefront Threat Management Gateway on Domain Controller. After googling about this, I found that only TMG SP1 can be installed on a DC, but I do not have Forefront SP1. ...
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NERR_DCNotFound when attempting to join Windows Server 2010 domain using PBIS

I have a RHEL 6.3 Amazon Web Service instance I'm trying to join to a Windows Server 2012 AD domain through PowerBroker Identity Services Open (ie: not enterprise). The Server 2012 instance is in the ...
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Windows Server 2008 R2 DC can't ping to other computers except other DC

I have been trying to troubleshoot this problem since 20 hours ago, and still can't find a solution. I brought down (orderly shutdown) a Domain Controller yesterday. No problem at all connecting to ...
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326 views

LSA Cache Entries - NTLM versus Negotiate Windows Authentication Providers

We have a situation, due to a recent employee name change, where the HttpContext.Current.User.Identity.Name property of an ASP.NET web application resolves to the old username. This has been ...
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2k views

Certificate enrollment for Local system failed to enroll Event ID:13

I've just finished installing a second domain controller to gain redundancy in the network. (and to solve some issues) After installation and configuring all errors are gone but one that is: Event ...
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775 views

unable to logon because of account restriction on Domain Controller

I have a Domain Controller which had installed RSA SecurID software Few months ago we switched from RSA SecurID to Gemalto smart cards. This DC was the last machine with RSA software installed ...
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40 views

Domain Controller, Windows 2012, Computer policy could not be updated successfully

I have issue with DC cant update computer policy PS C:\Windows\system32> .\gpupdate.exe /force Updating policy... Computer policy could not be updated successfully. The following errors were ...
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35 views

Would a duplicate DC on same subnet be bad, if ALL auth is only internal to the server?

Here's a weird scenario I'm looking for some guidance on. I have a VM that is a purpose-built "self-contained" demo environment. It has an application stack installed, as well as Active Directory, ...
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49 views

Microsoft Domain Controller, Account lockout polcy not locking out the users?

Just recently i have hardened the Microsoft 2003 domain controller, due to PCI-DSS requirement. I used CIS- cookbook as a guidance. the password threshold policy is set to 3. but as testing when i try ...
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107 views

Applying user settings on a Windows Server 2008r2 server slow from external computers

I have 2 almost indentical environments consisting of a Windows 2008r2 server host running hyper-v and on each host I have 2 Windows Server 2008r2 guests. One of them acts as Domain Controller and 1 ...
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Local group policy taking precedence over Default domain controller policy

Modified Default domain controller policy to disable and rename the Guest account name using below settings Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> ...
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72 views

LDAP query to obtain distinguished name of a list of users

Hi im working on a migration process on which we are migrating users from one server to another domain controller. Right now I have a list of users I migrated, but I also got another of them I didnt. ...
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12 views

Exchange 2007 SCR Setup Error finding Domain Controller?

just setting up my SCR enviroment however when running the Enable-StorageGroupCopy command its returning with an error stating that my exchange server object could not be found on my domain ...
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33 views

nslookup gives timeout based on request - what gives?

I have the following strange problem with the DNS lookups in our Windows domain (dns service runs on the domain controller): from machine 'A': dns request for machines in the same network zone ...
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33 views

Fix Account issues after removing DC from server with IIS?

We recently upgraded our single-domain Windows network by adding two new servers. We promoted them both to domain controllers and removed the domain controller from our webserver (which was set up ...
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36 views

Time Sync Issue for vm PDC on HyperV

I am a bit new the this forum. Not sure where to start but I basically found an article on this forum about HyperV Time Sync for VM Domain Controller. The owner of the post described the problems that ...
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30 views

Strange behavior from demoted DC

We used to run our own domain (referred to as OLD) but are now in the process of completely removing it and using the campus wide domain (referred to as CAMPUS). We have 2 DCs still active for our ...
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37 views

server 2012,invalid network adres

I have virtualbox with a windows server 2012 DC and a windows 8 client.I can login on the domain as Administrator on the windows client but when I want to change the password of the domain ...
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69 views

Restoring read only domain controller from VM checkpoint

I have several RODC on remote sites, and sometimes power failures corrupts ADDS database which takes some time to recover. I'd like to move RODC to virtual machine (on same server) to be able in case ...
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274 views

pfSense and Windows Domain Controller - configuration?

I've got a small scaled business network separated into green, orange and red using pfSense as firewall & gateway. In the local network, there's a Windows server machine hosting a domain ...
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94 views

Domain controller stops mapping drives from file server

File Server: Windows Server 2008 R2 Standard Domain Controller: Windows Server Standard FE 2003 SP2 This has happened twice now. User will try and log in using their domain accounts and will receive ...
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Samba Roaming not working

I had configured Samba as domain controler on Ubuntu 14.04. I can register computers(WIndows 7) to the domain but the roaming profile does not work. smb.conf looks like: # Global parameters [global] ...
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156 views

Creating Exchange account for user of subdomain

We have a W2008R2 server which serves as AD DC for intra.contoso.com and Exchange server. We have a W2012 server which serves as AD DC for subdomain sub.intra.contoso.com (which is not a new forest) ...
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90 views

Add 2012 Standard server to existing SBS 2011 domain for multipleRemote Desktop access to resources

Clients current network configuration: SBS 2011 domain with 15 user CALs /not used for email just pretty much used for data and occasional RWA to desktop PC's. They will be adding another 40 ...
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251 views

Secondary domain controller not converting to primary Server 2012

I was running my AD DS and DNS on an evaluation copy of Windows (let's call it old server). It was getting restarted after every 1 hour. So I installed a new machine with licensed version and created ...
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Why gpupdate fails?

So I have a Windows Active Directory Domain with two domain controllers, DC1 and DC2, both running Windows Server 2008 R2. DC1 is the primary DC holding all FSMO roles. It was functioning all right as ...
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597 views

Mysterious kinit-failure on Debian Jessie

I have a machine with the Samba 4 AD and the second as a client. After two days of good operation, suddenly the kinit stopped working on the client-side. The reason is quite mysterious. It cannot ...
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115 views

What happens when one of the 2 DC's goes down

There are 2 Domain Controllers running Windows Server 2003 x64 R2. The installed roles of DC1 (10.0.0.1) are: File Server, Print Server, Application Server, DNS Server and of course Active Directory. ...
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Domain Controller Not Found with Two DNS Address

I'm experiencing a problem on some windows clients connecting a Domain Controller. The domain controller is 192.168.10.240 and the client have the following DNS configuration : DNS 1 : ...
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53 views

Shared resource permission management (minimum required permission)

I want to grant a "tech" group access for managing the shared resources. Problem: The sharing tab is not shown to them. Moreover they can not even access the shared folder list via management ...
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548 views

ADPrep error trying to upgrade Windows 2012 server to DC in 2008 domain

Trying to promote a Windows 2012 server to DC in a 2008 domain and after passing all prerequisites and beginning the process, I get an error stating: adprep was unable to bind to any domain ...
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1k views

krb5kdc: cannot initialize realm MYDOMAIN

On an out-of-the-box Turnkey Linux Domain Controller, I ran apt-get install krb5-admin-server, and while it ran fine, except for this error (warning?) in the middle of the execution: Setting up ...
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195 views

Splitting labs into subdomains without breaking Kerberos and Active Directory

So I have a vSphere environment with ever increasing pools of servers. Each pool/group of servers includes something like a firewall/proxy server, and two application servers (mixed environment, Linux ...
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67 views

Why do all my 'Forwarders' tabs only list the domain's domain controllers?

I have recently created two new domain controllers in my network, running Windows Server 2008R2. There were two domain controllers already on the network (Windows Server 2003) In the new domain ...
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157 views

DNS not responding with IP address

I have 4 windows servers running 2012. One of them is a domain controller and the other 3 are connected to the domain. They all have static IP addresses ranging from 10.0.0.1 to 10.0.0.4, their DNS ...
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156 views

Can someone guide me with setting up Network Load balancing for RDP connections?

We have two servers web3 and web4 and a domain controller mws. I have been trying to set up load balancing for users who use remote desktop connection to connect to web3 and web4, but have failed ...
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Samba4 functionally on a 2012 domain

Will Samba4 work in a 2012 domain (2012 functional level)? Will Samba4 work as a 2012 DC standalone (that is: with no other DC's)? Will Samba4 work as a 2012 DC together with other DC's (Windows ...