We currently run Windows Server 2016 as our domain controller platform and are planning an upgrade. Most of our other servers, including on-premises Exchange, have already been migrated…
I'm decommissioning an old Windows domain controller and validating DNS on the replacement server at 192.168.214.15 with dcdiag /test:dns. The Delegations test reports this for the _msdcs.ourdomain.lan zone:…
I have an older Windows Server 2012 R2 domain controller named old-dc that used to hold the primary role. Two newer Windows Server 2016 domain controllers, new-dc1 and…
I'm decommissioning an old Windows domain controller. On the replacement server at 192.168.214.15, running dcdiag /test:dns reports a delegation error for _msdcs.ourdomain.lan: the DNS server is listed as…
We have an Active Directory environment with two domain controllers, both recently migrated from Windows Server 2019 to fully patched Windows Server 2025 using a side-by-side setup. A…
I'm practicing Active Directory in virtual machines on Ubuntu and currently have DNS, DHCP, and AD running together. I want to add a second domain controller for redundancy.…
I have a domain with one primary domain controller and two secondary domain controllers. The primary and one secondary still replicate normally, but the other secondary stopped replicating…
The environment has one primary domain controller and two secondary domain controllers. The primary and one secondary still replicate normally, but the other secondary stopped replicating after a…
I have two domain controllers, DC1 and DC2. DC2 holds the PDC Emulator role and is configured to use pool.ntp.org as its external NTP source. A device policy…
Our company runs a hybrid Azure and on-premises environment, with most primary services hosted in Azure. On-site, we currently have a couple of aging ESXi hosts running four…
A Server 2012 R2 domain controller was moved to a different Hyper-V host and upgraded to Server 2025. It is currently the only domain controller, and the old…
I recently moved a Windows Server 2012 R2 domain controller to another Hyper-V host and upgraded it to Windows Server 2025. It is currently the only domain controller,…
I recently migrated the network to separate VLANs, moved the BIND DNS service to a new machine and newer version, and changed the firewall/routing setup. The BIND server…
I recently migrated the network to VLANs, moved several systems, and migrated my BIND DNS server to a newer machine and version. The BIND server forwards queries to…
A small development environment has two Active Directory domain controllers. One rebooted during patch installation about three weeks ago and has remained in Safe Mode unnoticed. The other…
Staff noticed that the clocks on several machines were about two minutes ahead of their phones. I found that the domain controller holding the PDC Emulator role was…
I have a small development environment with two Windows domain controllers. One rebooted during patch installation about three weeks ago and came up in Safe Mode. Nobody noticed…
I tested a restore of a physical Windows Server 2022 domain controller backed up with Veeam Agent using a Full Computer bare-metal backup. I restored it as a…
I tested a bare-metal backup of a physical Windows Server 2022 domain controller created with Veeam Agent by restoring it as a Hyper-V VM on an isolated network.…
I'm testing a custom Active Directory attribute in a single-domain-controller test environment. I have Schema Admin privileges and followed the documented process: obtained a private enterprise number from…