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

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All options greyed out when trying to configure Active Directory Domain Services Windows Server 2012 R2

I am configuring the first domain controller for a new domain. The install of Active Directory Domain Services seemed to go ok, but when I attempt to configure the domain controller it gets stuck on ...
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1k views

DNS name server IP keeps reverting back to unknown for forward lookup zone

I'll start by saying I have not worked much with DNS and DC's. I'm a programmer who is trying to build out an environment with a domain to simulate a production scenario. My issue is the forward ...
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2answers
10k views

Permissions for Scheduled Tasks on a Domain Controller

I'm trying to run a Scheduled Task on a 2008 R2 Domain Controller and all was well until I set it into the production environment. I'm running the task as a Domain User that's defined in the "Log on ...
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1answer
1k views

Active Directory Domain Service started then stopped after dcpromo

I use Windows Server 2008 to install Active Directory follow this guide After a restart, I can only login to local account,not domain account due to the error No logon server are available! I check ...
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38 views

Windows Server 2012 has stopped accepting new wksts joining our domain, error 53: the network path was not found

We have Windows Server 2012 R2 Standard as our DC. Several workstations were added to our domain successfully. But then (I cannot determine what exactly could be a show-stopper) it stopped accepting ...
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2answers
22 views

Remote Desktop Services role - Do I need it in order to use MSTSC (RDP/RDC) in my domain?

Greetings and thanks for reading (apologies for the length). I'm a new Sys Admin and I have a (potentially silly) question for the more seasoned veterans. I'm migrating our primary Domain Controller ...
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13 views

Issue with creating a new forest and promoting a domain controller

I am creating a forest and domain controller for the first time. The error I get is: Error determining whether the target server is already a domain controller: Starting a command on the remote ...
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25 views

How to disable Null Session Enumeration of the DC?

I am a sysadmin for a company, and we just had a Penetration Test done on our internal network, the team discovered that it is possible to perform query\enumerate our DC (Server 2012) for information ...
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21 views

Hyper-V standards, replication before or after exchange

I'm currently building my own lab to improve, however I have a couple of general questions. I have 2 dell R710 servers, with 2012r2 and the hyper-v role installed. What I want to do is build up 4 ...
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1answer
1k views

Set up trust between Azure AD and local AD

We are moving some VM's and Cloud Services into Azure, but we need those services to still connect back to the AD of our partner. I'm a developer, not a sysadmin, so I'm not sure how to do this, or if ...
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1answer
940 views

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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1answer
16 views

New site is not listed when adding new domain controller

I inherited this network and I'm trying to figure out what I am missing. I created a new site in Chicago and I want to add a domain controller to it but the new site is not listed when I go to ...
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4answers
76 views

Will cached domain credentials stay working if machine never re-connects to domain?

I have researched this thoroughly, and cannot find the answer I am looking for. A company I recently left is going through a bankruptcy. They have already auctioned off most the IT equipment, ...
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10 views

Running Session Virtualization in Server 2012 off a single server box

My technical level is below average here. I have an HP (Proliant DL380 Gen9 Xeon e5-2620) machine running Server 2012 and Wyze thin clients off which I want to run 10 full Windows 8 Remote Desktop ...
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1answer
67 views

Can't log in to the DC remotely as Admin

I need some assistance ASAP my old IT Manager who got fire mess up our DC. Now I can' login to DC remotely as Administrator. Non of the 5 Windows servers that I have. This is the error message " To ...
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1answer
49 views

Explain how FRS replication backup works

Please explain me why I have to add just some registry keys to repair sysvol-replication. I mean, it is like file-based and I want to backup it before I change anything. There are some NtFrs 13568. 2 ...
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1answer
2k views

Linux Client Active Directory Authentication stops working when failover

I have an issue with Linux clients trying to AD authentication by targeting a DNS name (corp.example.com). I have 2 Domain Controller servers DC1(10.0.0.3/24), DC2(10.1.0.3/24) both domain controllers ...
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78 views

DNS Inaccessible

I know this might seem a duplicate but wait! We have a Windows Server 2012 R2 domain controller, it obviously is a DNS server which hosts one AD-integrated domain. recently, it stopped responding and ...
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Windows Server 2012 - Can't join computer to the domain

This was supposed to be an easy one but I ran into an issue here. I set up the domain and a static IP on the server. The server is connected to a router/AP (which obviously functions as a switch) as ...
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1answer
3k views

Cannot ping my domain-joined server - Can only ping domain controller - host unreachable

I have a HyperV Server hosting a Domain Controller VM (192.168.1.50) and another VM (192.168.1.51) joined to this domain. I have: domain controller as DNS server forward lookup zone for the domain ...
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38 views

Logging in after an Acronis Restore on Server 2003 with “Windows Cannot Connect to Domain…” msg

We have two machines both running Windows Server 2003. The AD Machine is the Active Directory. The CTX Machine is our Citrix File Server (this has a RAID Array). Recently we had a RAID problem and ...
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1answer
1k views

Read Only Domain Controller not replicating after writable domain controller outage

I have a RO domain controller that replicates with a writable DC which is at another site. The other week the writable DC was out for about 2 days because of maintenance at that site. After this ...
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11 views

Joining Samba4 domain as BDC

I am attempting to build a Backup Domain Controller (or BDC or Read Only Domain Controller, or whatever you decide to call it), but I am having issues joining the server to the Samba4 domain. I have ...
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1answer
18 views

EventLog “Access Denied” after installing an additional DC in a 2012 environment

After promoting a new DC into an existing domain, Eventviewer shows the following: I might as well mention that the Installation itself did not experience any issues When looking at the ...
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4answers
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“Peaky” CPU Usage on Domain Controllers

We have two Windows Server 2008 SP2 (sadly not 2008 R2) Domain Controllers in a small 150 client domain that are exhibiting very "peaky" CPU usage. The Domain Controllers both exhibit the same ...
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1answer
142 views

w32time in domain polling from wrong Domain Controller

From the MS Documentation I can see that computers in a domain should get their time from the PDC domain controller, and if done right the PDC should get it's time from an external source. In my ...
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1answer
25 views

“sub domain” in lnternal network

i have a small network under a Windows domain-controller. the server (Win2012) run a WebSite which is accessible by typing the machine-name (srv/). i want add a website with binding to sub-domain: ...
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1answer
51 views

How to create an Internet facing Domain Controller Without VPN

I am extremely new to this. I am trying to create a domain controller that could be contacted via Internet. In clear words, I am trying to create a Windows Server 2012 R2 domain controller with ...
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107 views

Event log subscription returns error code (0x138C)

I have been battling getting Event log subscriptions to work on my server 2012 R2 domain controllers. I have created the collector-initiated-subscription using the GUI and selecting the defaults ...
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4answers
8k views

SNMP service security tab is missing - Windows Server 2012 R2 - DC

I have to configure the security settings for the SNMP-Service on a Windows Server. But they are missing! Here are the facts: OS: Windows Server 2012 R2 I installed the SNMP feature and I believe, ...
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1answer
34 views

what are the implications of running a FQDN as internal AD domain and point A-record for website to different host?

The MSP for a law firm office that has just joined our company is using a FQDN as an internal AD Domain and has been doing so for sometime apparently. They have this issue in that they have a website ...
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2answers
83 views

Any Tips when Raising the Functional Level of a 2003 Domain

I will be doing my first DFL rising this evening (from 2003 to 2008 R2). Is there anything worth noting that I should look out for? Any risks involved? Or server reboots? I've done a system state ...
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Unattended DCPromo creating new domain fails as user is not domain admin [closed]

I have installed Windows Server 2003 and am trying to make it a DC on a new domain. It works ok if I use the wizard, but when I try to use an answer file, it says 'An AD domain controller for the ...
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1answer
69 views

Cloning Windows 2012 R2 domain controllers with KVM

Virtual domain controller cloning is a new feature from Windows Server 2012 that I use because it's a very useful and simple way to add additional domain controllers to an Active Directory domain. ...
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1answer
59 views

Re-join same computer to Windows domain without domain admin privileges

Is it possible to have a previously domain connected client computer re-join a Windows domain after a clean re-install of the OS, to assume again it's old identity, all without the explicit say-so of ...
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4answers
62k views

“The RPC Server is unavailable” when replicating domain controllers

I have two domain controllers: DC1: Win2k3 R2 EGDC1: Win2k8 R2 When I try to replicate these two (via Manage Sites and Services and under NTDS Settings) by selecting Replicate Now, I get the error ...
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1answer
36 views

Any way to query LDAP binds on domain controller?

I'm working on planning a DC rebuild, and I'm trying to be as thorough as possible before demoting the old one. Is there any way to view all LDAP connections to a DC either by source IP or hostname?
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1answer
99 views

Cannot create new users in Active Directory (Using Samba4 as DC and AD)

I setup Samba version 4.1.17-Ubuntu as domain controller and active directory, and everything seemed to go smoothly, but when I try to use the administrator account on one windows 10 PC domain member ...
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2answers
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processing of Group Policy failed only on 2008 Servers and Name Resolution failure on the current domain controller

Spent last 3 months doing a upgrade from 2003 domain to a 2008R2 domain. our last DC was rebuilt (5 total) and brought up on line. After it was put on line we have some 2008 and 2008R2 servers (10 ...
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1answer
144 views

dcpromo prerequisites for Active Directory preparation failed

Cannot promote a new Server 2012 R2 server to domain controller on an existing domain. The prerequisites check fails. Verification of prerequisites for Active Directory preparation failed. Unable to ...
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2answers
52 views

Are there any specific tools for troubleshooting Domain Controller & Client connectivity?

I am setting up a test rig on Amazon Web Services comprising of 2 web servers, 1 database server and 1 domain controller. All the servers are Windows Server 2012. I have had random occurrences of the ...
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1answer
39 views

Dc Replication issue when on one of the Dc moved to another location [closed]

We have one Domain controller in Dallas office and other 2 in Chicago. An administrator in Chicago moved 1 domain controller to Salt lake, now the problem starts here Chicago location and salt lake ...
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2answers
88 views

Cannot run SAMBA (DC) and OpenLDAP, (The port is being used)

I installed samba and made it a simple domain controller, and I intend to set it to make the authentication over OpenLDAP. The problem is I can NOT run both slapd and samba processes at the same time. ...
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14 views

What are these ACS containers under my subnet objects?

I have ACS folders under my subnet objects in sites and services. Did some googling and now I'm more confused. Apparently this is Windows QoS Admission Control Service- which is Windows ...
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1answer
27 views

Is _msdcs a separate application partition?

I have read in MS docs that by default DomainDnsZones.domain.com and ForestDnsZones.domain.com app partitions are created when dcpromo is run on the first DC in the forest. Isn't _msdcs not also ...
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1answer
162 views

Netlogon - Domain Trust Secure Channel issues - Only on some DCs

We have a 2 domain environment. We were having issues with slow connections, authentication failures, and hung resources only during OFF-PEAK hours when there were very few users logged on. The ...
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1answer
49 views

Join Computer to Domain with Seperate Active Directory and DNS Servers [closed]

I'm trying to understand how to join a client to a Windows domain that has a separate AD and DNS server. I have installed one server with the AD role and one server with the DNS role. Even if I ...
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1answer
81 views

Received an email about abuse on our public dns server

We have several virtual machines on a public network due to the ip addresses being public. We received the following email today: We have received the following complaint for xxx.xxx.xxx.xxx. ...
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2answers
6k views

How do I solve LDIFDE errors on “last token starts with 'C'” and “change-modify entry is missing the terminator '-'” when..?

How do I solve LDIFDE errors on "last token starts with 'C'" and "change-modify entry is missing the terminator '-'" when trying to pair existing users to exiting security groups (domain migration)? ...
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Symlinked files in shares not showing for clients

I have a bunch of shares that contains symlinks to files and folders. But the files don't show up when viewed by clients. Let's assume I have Ubuntu set up as a Samba Domain Controller and I add a ...