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Questions tagged [domain-controller]

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

In Microsoft Active Directory and NT4 domains, a domain controller is the central repository for all of the user account authorization information. It allows a person to sign on once and be allowed access to many different resources.

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Can a Hyper-V VM made from a Server 2012 R2 domain controller backup be used to replace the physical domain controller if it fails?

We have a Dell PER520 with Server 2012 R2 running 5 servers; AD DS, DHCP, DNS and WDS. We created a Hyper-V VM on another server using a bare metal backup created with Windows Server Backup. The VM server is up and running with the network…
ITED
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Unable to join Azure Windows Server VM to local domain

I'm trying to get my Azure Windows Server VM to connect to my local AD. I've already created a Site to Site VPN Gateway and connected both the DC (172.16.1.5) and VM (172.16.1.4) and I've confirmed that both can ping each other. DNS of the VM is set…
Liaoo
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Alternate DNS server outside of domain

I'm managing a small network that only has a single DC, which is running DNS. When I'm doing maintenance in the server in order for users to keep internet connectivity I have to configure a alternate DNS server (like 1.1.1.1) on each desktop. Are…
Diogo Ferreira
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Parent domain vs Child domain

As far as I know, a child domain's fully-qualified domain name (FQDN) must be a subdomain of the parent domain's FQDN. Also an implicit trust (two way - transitive) is established between them. Are there any differences between the child domain and…
Allan
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Can I add a child domain to an existing child domain?

Under a root domain i have 2 child domains. What I want to do is to create a child domain using an existing child domain as its parent domain, but it's currently giving me credential errors. Do I need to use the (child domain that's going to act as…
8d2013idk
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ERROR_NO_SUCH_DOMAIN When 2 of 3 DCs are down

I have 3 DCs on my domain, (2 on local office, 1 in Amazon AWS), and I would like to move to Amazon and cut off the 2 local DCs. I have shut down the 2 local DCs, to test if the AmazonDC is working correctly, but then I receive…
Zsolt J
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Unable to join a dc I just created with samba ad dc

I followed these instructions: https://wiki.samba.org/index.php/Setting_up_Samba_as_an_Active_Directory_Domain_Controller These instructions didn't work exactly as they read. There was one step I didn't get a result because samba was stopped and it…
Rob Campbell
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Unable to Log In to Domain Computers with Spoiled Domain Controller

The domain controller in our domain network is completely down and we don't plan to repair it. We couldn't log in to the computers because of that. Worst case, we even forgot the local admin password. We are trying to use the bootable USB to reset…
CK Tan
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DNS on my domain controller not working

The DNS server on my Windows Server 2019 AD domain controller has completely crapped out, and I cannot even find anything that remotely addresses my issue. When logging into the DNS GUI, my server is marked out and almost all the right-click…
Andrew
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Event 4771 (Bad Password Logon) Does not show proper client

We are having issues with frequently locked out accounts. We are having 4771 {Bad Password} events on our main DC. Issue: Within the event, the client machine is not properly shown. Instead another DC is shown as client host name: only in rare…
Julian Bechtold
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SRV records not created on new domain controller

I've stood up a new domain controller and attached it to my existing domain and that seemed to complete without issue. But then when standing up a new server and attempting to attach it to the domain using the new domain controller I got an error…
Tony
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Domain controller failover fails unidirectionaly

The problem I am having is that if I take one of my two writable domain controllers offline, nobody seems to "fail over" to using the other domain controller like they're supposed to - applications we run within our network that use AD for…
The ITea Guy
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Why Do Our Remote Connection Softwares Drop Until DC is rebooted?

I have been having a recurring issue (1-50 times/week!) where all employees using a remote connection software drop out at the same time and cannot reconnect until I reboot the DC (i.e. They get a "connection lost" message in the software and it…
Jeff
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Domain Controllers Cross-Site DNS IP Configuration Best Practice

Dears, Currently, we have the below setup for DNS/DC IP configurations in our environment. I feel that something is not right/missing. HO-DC1 IP: 10.10.10.11 Primary DNS: 10.10.10.12 Secondary DNS: 127.0.0.1 HO-DC2 IP: 10.10.10.12 Primary…
Aboodnet
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When does a Windows client needs to query the domain controller's SRV record?

Today we have been alerted by the network support guys about high memory consumption in the firewall (FortiGate 100F) that could lead to it entering safe mode. We searched the logs and found a truckload of DNS queries from the clients to the primary…
sibirsk
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