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

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Active Directory Multi Domain Enviornment

I work for a small organization which will be starting another branch of business here shortly. We have an existing active directory infrastructure and are looking to add another domain to the ...
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Missing SRV record at DNS server

Server 2008R2. 2003 functional level. One of my branch DCs, which we will call BranchDC1, is not registering SRV records in example.com/_msdcs/gc/_sites/_tcp. The DC is marked as a Global Catalog in ...
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Enabling LDAPS: Cannot get to open port 636

I have a domain controller, which has Active Directory (AD). I want to turn on LDAPS on this AD, so that I could access the AD via secure connection. I have followed the following guide: ...
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Client computer(Windows 8.1 Pro) unable to connect to a domain(Windows Server 2012)

I am unable to connect a client pc to a domain controller which is a Windows Server 2012 Datacenter. I have tried connecting it : Through the system menu in Control Panel Putting all the ...
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Error adding child Active Directory domain to existing forest

I'm building a test environment containing multiple Active Directory domains in the same forest, but I'm having strange issues while trying to add a child domain to the forest root domain. All ...
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66 views

Audit policy being overwritten by “something”

I'm installing vendor software which requires account auditing to be enabled on our DCs. The problem is Audit Policy is not being pushed. Checking secpol.msc shows Windows Settings->Security ...
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40 views

Create a backup domain controller, but don't want it to do anything [closed]

I set up a second domaincontroller fot backup, but if I take a look at he log files, I see that is manages logons for half of my computers, etc... Can I set it up that it actually does nothing, ...
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138 views

Check if a Domain Controller has been cloned

I have reason to believe that previous administrators cloned our Domain Controller at somepoint in its recent lifetime. The DC at one point was running on Server 2003 and has since been upgraded to ...
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Windows Server 2003 DC migration to 2 x 2012 R2 DCs - DCDiag error = Advertising: SERVER IS NOT RESPONDING or IS NOT CONSIDERED SUITABLE

We are upgrading our single 2003 domain controller (DC1) to two 2012 R2 controllers (DC2 in Sevenoaks and DC3 in Manchester (different site in Sites and Services for Manchester)). DCpromo (the wizard ...
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Reuse old domain controller IP address

We currently have 2 Windows Server 2008 R2 domain controllers, and I want to replace one of them with a Server 2012 R2 DC. I also want to reuse the IP address after I demote the old DC. What is the ...
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The security database on the server does not have a computer account for this workstation trust relationship. Error in 1 PC [duplicate]

We have a small office with 9 PCs and a Windows Server. Today one PC, Cypher shows this when trying to log in: The security database on the server does not have a computer account for this ...
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20 views

Performing Nonauthoritative restore of AD on offline DC

I have a domain controller that's been offline for 3 months. If I bring it back online normally, it will cause issues due to the tombstone life now being over the 60 day expiry. What's the best method ...
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New Domain Controller to combine two Domains into one: Domain replication or DNS?

Background We currently have two networks, one in London, and one in Brighton. We use Office 365 for email, Lync and Sharepoint, so there is no Exchange server. Both offices are connected by a VPN. ...
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Windows server 2012R2 RDS installed on Domain Controller will not uninstall

Knowing I had 90 days to figure out the licensing, I installed RDS. Seems I didn't need to as Administrators can log in anyway. Now it seems we don't want to buy any more licenses so I figured I would ...
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55 views

Windows computer not recognizing membership in active directory group

In my active directory setup (Windows Server 2012r2 acting as domain control), I have a group called "TestComputers". I have a domain computer called "Computer1" that is a member of this group. On ...
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How to set up internal dns to copy public dns plus additional entries?

I have a windows domain example.com and a public domain of the same name. How do I set up my company DNS to resolve all the subdomains like the public DNS does, and more? Do I have to copy the entries ...
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Error getting the list of sites from the target environment: An invalid dn syntax has been specified

Trying to add another (second) Domain Controller to an existing Domain. In the second step of "Active Directory Domain Services Configuration Wizard" getting the following error: Error getting the ...
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Server 2003 Missing NETLOGON Folder

I've just started working for a new company where there was perviously no-one really managing the IT environment, and it's quite a small company that has only one Domain Controller (plus other servers ...
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Group Policies For Wallpaper Failing

We have some computers that are no longer getting our wallpaper pushed by group policy. In checking to see if they can access the UNC for the wallpaper (\domain.com\NETLOGON\LogonFiles\our-logo.jpg) ...
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78 views

The requested operation requires elevation

We have about 15 PCs on our network. I can make changes to all the PCs except one. I keep getting the message "The requested operation requires elevation". When I try to run a program as an admin, ...
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AD Replica DC Promotion Stall

I recently inherited infrastructure duties for a small startup I am working with. My traditional role has been development, so bear with me... I was hoping to start off on the right foot, and get ...
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61 views

Samba DLC and Windows 7 Clients. Random drop of connection. Kerberos?

I have a Samba (Version 4.1.6-Ubuntu) DLC (Server role: ROLE_ACTIVE_DIRECTORY_DC) on an Ubuntu Server (Ubuntu 14.04.1 LTS) Several Windows 7 Professional Clients are connected every day and usually ...
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Windows Server Essentials Experience DirSync Not Working After Adding Second Domain Controller

I recently did a domain upgrade for our office to Windows Server 2012 r2. Upon seeing the new Windows Server Essentials Experience and its ability to perform a directory sync with Office 365, I ...
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Windows Server 2012 R2 Foundation joining a domain

Today I've had a problem with my Microsoft servers. This is my environment: Windows 2008 R2 standard: Domain Controller (AD) Telefon Server Windows 2012 R2 Foundation: Web Server (Apache) Some ...
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58 views

Single forest with multiple domains - authentication?

I have a single forest and a 2 domains in it. Remote sites have a mix of users from both domains. All of my domain controller are global catalogs and trusts are set up. Do I need to have domain ...
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Domain Controller Demotion & static ldap querys

I am going to be demoting some DC's and want to see if there is a way via wireshark or netstat or something to see if a server might be out there that has statically mapped to them for LDAP queries. ...
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415 views

Authenticate client against specific Domain Controller

I am having an issue with an active directory account not running login scripts. The scripts run fine in one location and not in the other. Getting the following errors in the event logs: ...
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Prevent windows users from logging into, pinging, or browsing other workstations [closed]

Bluecoat security did an analysis of the Sony attack and says the following "This particular sample highlights the value of a network architecture where workstations cannot talk to each. While ...
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170 views

Adding client computers to an active directory domain controller

After facing a hell of a problem with adding a client computer to a domain controller, i followed the answer i got on this site and used my server's IP address as the preferred DNS on the clients ...
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Domain attached file server not authenticating with DC

I have 2 servers: Domain controller (Windows server 2012 std) - 192.168.1.2 Name dcsrv01 File server (Windows server 2012 std) - 192.168.2.2 Name fsrv01 The file server is domain attached. The two ...
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35 views

Replace the domain controller without copying the AD

we might have some special terms to do with replacing our DC. The current DC is running on an old machine with Windows Server 2003. As of the GPOs we aren't able to manage all new computers and as the ...
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62 views

Merging multiiple domains with the same existing domain name (office.local)

I am working with a new client who has 5 offices and four of which have a single domain controller with the name of OFFICE.LOCAL and another one with the domain controller DENTAL.LOCAL. Oh and all of ...
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Server 2012 R2 Active Directory Domain SRV dns records suddenly disappeared

I have a test domain that I recently configured. All of a sudden, no users can log in except those with cached credentials. The domain includes two domain controllers that are both global catalogs ...
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Running a Windows Server 2012 Domain Controller in Hyper-V

I attempted to install Windows Server 2012 on a Dell PowerEdge 2850 and found out that the server may not support Server 2012. Is there any downside to running a Windows Server 2012 domain controller ...
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LDAPs using Anonymous Access to AD forest

There is a problem related to AD which I cannot understand what configuration is missing to fix the issue. I have two DCs: testa and testb and both contain AD. I'm logged in to testa and I'm trying ...
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96 views

Windows server 2008 R2 Certificate Authority error event viewer

I am getting the error "The windows default policy module initialize method returned an error. The specified domain either doesn't exists or could not be contacted the error code is 0x8007054b. The ...
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SAMBA: wbinfo -r returning -1

I have a Clearos server acting as a PDC using SAMBA. I have set up an Ubuntu client then connected to the domain and authentication is working. On another Ubuntu client i get the following error su ...
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Will a Windows domain rename require new SIDs?

If I rename my local windows domain on my domain controller will all of the user accounts associated with the "old" domain name need to be recreated? Will the user SIDs still be valid and would my ...
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Contact DC from a client without DNS

I have read Can I create a DC without a DNS Server?. But my question is a bit different. I have one client in a completely different subnet from the DC. That client does not have access to the ...
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329 views

Encrypting SMB traffic with Samba

We use Samba on Ubuntu 14.04 LTS as a PDC (primary domain controller) with roaming profiles. Everything works fine, except for if we try to enforce encryption via setting: server signing = ...
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Colossal Failure After Domain Rename

The backstory... I recently upgraded a MS Server from 03 to 2012. The server needed to be a domain controller and for simplicities sake I named it foo.com instead of naming it something different ...
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kinit won't connect to samba4 domain controller, cannot resolve hostname

i have set up a domain controller on my virtual machine. At first i will post all important configs, so you know what works already. Hostname: affenhirn2 Domain Name: example.affenhirn2.local (i am ...
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How best to recover from Primary Domain Controller failure?

Recently my small, aged private office Windows Server 2008 machine failed. Unfortunately, the machine was my primary domain controller and I don't have any type of secondary domain controller in the ...
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decommissioning a domain controller [duplicate]

I am new to AD. We have a total of three domain controllers that are also DNS servers. Can I decommission the DC running Windows Server 2003 standard. Will the global catalog be replicated safely?
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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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141 views

AD FS and DC on same Server

i have to connect AD with Azure AD but we have a 2008 r2 server and wwe don`t want to upgrade the server to 2012 r2. Is it possible to have the domain controller and the ADFS server on the same ...
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Domain time drifting with VM DCs / host domain members

I'm following the advice given in this article: ...
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How to setup a Domain Controller in the cloud

We are implementing a new Windows Server 2012 R2 domain controller for our 2 small offices, and we want to set it up on Amazon EC2. I have read that with this type of setup you normally use a VPN. How ...
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Resetting DC Password from DSRM

How can I reset my DC's password? I am able to login to the server in Directory Services Restore Mode. I tried pulling up AD DS Users and Computers from there, but it does not appear that it will load ...
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What is “Ticket Options” Referring to in Domain Controller Event Logs?

I'm trying to figure out what Ticket Options is referring too within this event log off my domain controller. It is in response to a kerberos authentication request. AgentDevice=WindowsLog ...