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 8.1 machines have black screen after removing one of two domain controllers

We recently had a DC crash out, fortunately(?) not our GC, so we removed it from AD, and DNS. Most of the machines on the network (All of our XP, 7 , 8 machines) appear to have picked up the new DC ...
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130 views

Continuously check LDAP connectivity to Domain Controllers ( LDAP Heartbeat Check)

working on developing script which runs via schedule task ; whole purpose of it is to target few domain controllers and continuously(for every 2 sec) do a ldap query targeting that particular DC and ...
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12 views

Windows Domain controller recover test

I'm testing a Exchange 2012 VM recovery in a Hyper-V test server. I have this VM, 2 DC and a Exchange server: SRVDC1 (pdc, nm, rid) SRVDC2 SRVEX2 As far as I know I need to recover also a Domain ...
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89 views

Add additional name to a Domain Controller

I am looking to rename a Domain Controller. Functional level and everything else means I can use netdom to carry out the process. Looking a the technet article on the subject I can see the first ...
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15 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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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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2answers
64 views

Domain Controller using sub domain while hosting provider does main DNS

I'm trying to setup a Domain Controller on Windows Server 2012 R2. I read that best practices are to not use a made up TLD (such as .local, .lan, etc.), but use something that you actually own (say ...
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241 views

How can I prevent the compromise of a Domain Controller on ESX stored in a unsecured location?

A client of ours has a DC that will be located in an insecure location. RODCs and separate domains/forests are not permitted by management. All the servers will be located on a VMWare ESX server. ...
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69 views

Infrastructure advice - appliaction and network servers

I'd like to ask for server infrastructure advice. We'll be upgrading our network infrastructure (built on MS ecosystem) and so far we have two servers (not counting ISA server): one machine serves ...
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3answers
72 views

DNS slow after losing DNS Server

We have set up a small Windows Server 2008 R2 network with a domain controller which is also acting as the DNS server for the network (we opted to install DNS when setting up the domain). This network ...
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47 views

what happens to the local users and groups when promoting a server to a domain controller? [duplicate]

What happens to the local users and groups when promoting a domain member to a domain controller? I have a Windows Server 2008 that I have made to a domain controller by installing AD DS, but it was ...
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89 views

Windows Server 2012 Migration (DNS/AD DS Standard Eval to Essentials OEM) P2V -> Do I need a Secondary Domain Controller during migration?

This is my first post on this exchange (although not my first on stack exchange), so please have patience. I am a 3rd year student intern, and I have been tasked with virtualizing the server systems ...
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39 views

gpupdate failing when using Samba 4 AD DC

I have a Samba 4 AD domain running with 2 DCs on Centos 6.5, with a named DNS backend. I have multiple Windows 7 machines joined to this domain, which is fine. However, I can't get GPOs to apply. ...
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23 views

Powershell waiting for more parameters when asking for all users from a specific OU?

I want to get all the users from OU "myusers" so I have this cmdlet right here: get-aduser -filter * -searchbase"ou=myusers,dc=domain,dc=com" But when Im running it, powershell prints a >> ...
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53 views

what happens when a DC fails? How can the clients identify DC failure? [closed]

When a DC fails, it loses the privilege to authenticate and so client will find for secondary DC closest to its site. In another scenario, client has selected a DC closest to its site by using subnet ...
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18 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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3answers
63 views

Domain account credentials fails to start scheduled tasks

I have 2 Windows 2000 servers in a domain 'DC', which run numerous windows scheduled tasks under the 'DC\Task-User' account. These tasks are and have been running successfully in the past couple of ...
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1answer
52 views

How to logon with local account? RODC “There are no logon servers to process your request”

I have a site-to-site VPN, writeable DC in main office, Read-only DC in branch office. Today the VPN went down, but i couldn't log in to the read-only DC - the error message came up There are no ...
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68 views

how to expose Domain Controller on public IP address, and make other DC talk to it?

basically we have 2 DC servers which used to have site-2-site VPN but it's not working anymore. So we started to get various errors, DNS stopped working, etc, etc. As a last resort attempt (before ...
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782 views

Why can I login to a box even if the AD Domain controller is down?

Scenario: While my DC is running, I log into an arbitrary machine. I stop the DC I log off the arbitrary machine. Let's bounce it for good measure, too. When the machine comes back up, I can still ...
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2answers
164 views

How to find which machines are configured for specific DNS server?

We are currently removing ancient DC's from our domain so we can upgrade and I ran into an issue the last time one was removed. We had a few old UNIX machines that were pointing to a certain DNS ...
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59 views

Looking for advice, domain controller/remote logon

Alright, so we currently have 2 locations with 10 pcs at each location. We're looking for a solution that will allow us to have any user, use any PC, at either location and be able to login without ...
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227 views

How to remove orphaned Domain Controller's DNS records?

It looks like in the past there were some two improperly decommissioned Domain Controllers (DC1 and DC2) that belonged to this domain. I am concluding this based on some remaining records in the ...
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71 views

Restricting User Rights Assigning in Default Domain Controller Policy

I am currently reviewing my work's default domain controller policy GPO against the MS Security Compliance Manager, and one of the things I have found is that there are many things that have user ...
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53 views

How can I upgrade an ancient Win 2000 based domain controller to Windows 2008/2012? (by replacement)

We're running Windows 2000 as our domain controller (!) and a separate backup domain controller, but as the PDC is 12 years old we would like to replace it. We have a couple of 2008 R2 and Win 2012 ...
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161 views

Active Directory - List ISP DNS servers as Forwarders?

Background: I have a relatively small Active Directory domain (Windows 2003 Functional level) with two domain controllers, both running DNS servers. They are the primary and secondary DNS servers ...
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1answer
66 views

V2P of a domain controller?

I work in an environment where the amount of paperwork I have to do to stand up a single server in boundless. That being said I'm standing up two new 2012 R2 Domain Controllers. One is to be a virtual ...
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57 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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1answer
102 views

Domain Controller all FSMO roles, AD,DHCP,DNS 2008r2 backup best practice

hello I am looking to back up my 2008 r2 domain controller, we have 1 forest and 2 domain controllers, idomain-1 and idomain-2 idomain-2 is used for failover and idomain-1 replicates to it. having ...
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116 views

Joining to a windows domain — What ports are needed?

What ports are needed in order to join to a windows domain? I am getting an interesting message where the server can find the domain controller names, but cannot reach them.
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1answer
16 views

2008 DC DHCP Inquiry

We have a few servers mainly for SVN, File and nightly builds. We only use the DC for ALC. Currently, I'm using the Sonicwall's Built in DHCP to issue IP's to developers. Of course if the firewall ...
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263 views

How can I map a network drive from another domain?

I am using terminal-service server with Windows Server 2012 and we have two terminal servers share trough NLB, users connect to a terminal in the DOMAIN1 domain with Remote Desktop Connection (see ...
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366 views

“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
100 views

How can I prevent a second network interface from updating DNS with its IP address?

Recently I added a second network interface to my Domain Controller, and assigned a private subnet to provide a iSCSI volume for backups, but the IP address from this interface is being propagated to ...
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2answers
107 views

How Active Directory Dynamic DNS updates works behind the scenes?

I've looked through the AD documentation and I was not able to find any conclusive answer to this question. It's plain simple, but hard enough to be answered. How DDNS of AD works behind the scenes? ...
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2answers
137 views

Setting up a domain controller in an Azure Virtual Network, how should I configure the DNS Server List?

I've set up a simple Azure Virtual Network (VN) consisting of a single domain controller and a few clients. Now I need to know how to configure the VN's DNS Server List. Here are the two options I've ...
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43 views

LDAP connections favoring 1 DC over the other in same site

Observing spikes in "AD Search Subops" counter and "PROC LSASS%" counter daily on DC A relative to DC B; its not in maintainence windows; its at start of business hrs daily. -> Eliminated the point ...
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63 views

changed public ip address of domain controller now other servers cannot find dc [closed]

I have 3 virtual machines. I had to move them to another dedicated server since the company I was using is having so many issue. The new dedicated server, of course, has new ip addresses. They are ...
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90 views

Windows Server 2008R2 Domain Controllers - Failed test VerifyReferences

While running DCDIAG on our Windows Server 2008R2 Enterprise Domain Controllers, I discovered the following error message on both DCs. These domain controllers where migrated from a Windows server ...
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34 views

Does Local Server Admin Become Domain Admin When New Domain Is Created?

Does the local server administrator become a domain administrator when new a domain is created on that server? This question relates to a 2008 server. Whenever I login through Logmein I am logging ...
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187 views

How to Prevent Server 2012 Essentials from Shutting Down Due to Not Being FSMO [closed]

Apparently, Server 2012 Essentials doesn't like the fact that I have joined it to a domain where I do not want it to be a domain controller, and due to this fact it is shutting down automatically ...
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1answer
235 views

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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1answer
50 views

Synchronizing RODCs to NTP servers?

I've read this nice article from Gareth Hooper regarding Domain Controller syncing to external time sources. In essence, he wrote that although Microsoft don't actually condone the practice, it's a ...
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370 views

Demoted domain controller still authenticating users

Why is a demoted domain controller still authenticating users? Whenever users log onto workstations with domain accounts, this demoted DC authenticates them. Its security log shows their logons, ...
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1answer
55 views

Joining an AD domain from Workgroup with runas

I've got an user A who is connected to a Workgroup. From this Workgroup, now, I want to connect, with the console, to the user "john" who belongs to an active directory (MYAD) Though I try : runas ...
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54 views

Best practice to migrate Server 2003 x64 to Server 2008 x64

We have 2 Domain Controllers running Windows Server 2003 R2 x64. DC1 has the FSMO roles and DC2 acts as a 'secondary' DC. Both are Global Catalog servers. DC1 has these roles installed: Domain ...
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252 views

Set-AzureStaticVNetIP allocated IP address not persisting over VM de-allocation

I am experimenting with the Set-AzureStaticVNetIP powershell command to allocate a static IP address to VMs. I can get the command to work and allocate an IP address correctly to a VM, either on ...
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3answers
622 views

How To Properly Setup DNS Forwarders On Windows Server

I was wondering how to properly setup DNS forwarders on Windows Server 2008 R2. I have three Domain Controllers. Each of the DC's have have following: AD Role DNS Role DHCP Role Static IP Address ...
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1answer
87 views

DHCP Warning Sign Icon On Windows Server

I have a Windows Server 2008 R2 SP1 Domain Controller. I have the roles AD, DHCP, and DNS installed on this server. I noticed today that there was a warning sign on my IPv4 setting, but not on my IPv6 ...
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255 views

How to force active directory replication from one DC to another

I am having issues replicating AD from one DC to another. Both servers are Windows Server 2008 R2 SP1. I have used the GUI option in sites and service to force replication. I have also tried repadmin, ...