A domain controller (DC) provides critical services like authentication and authorization for an Active Directory domain. More accurately, a DC runs on Windows Server operating system and that has Active Directory Domain Services (AD DS) installed on it. All these we will see very shortly. In this guide, we will learn how to how to…
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A Domain Controller (DC) responds to authentication requests. It has an hierarchical structure called domains. In this article, I will be discussing how to Setup a Domain Controller as Recommended by Microsoft in HyperV. Please see Pleasant User Group Permission and User Access, Domain Name System Protocol: Client Registration Issue, Domain Name System: How to…
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In this article, you will learn how to demote and remove a Domain Controller on Windows Servers. According to techdirectarchive a domain controller (DC) is a server computer that responds to authentication requests. It participates in the replication and contains a complete copy of all directory information for its domain. If you want to know…
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Remote Desktop Protocol (RDP) is a special network protocol that allows a user to establish a connection between two computers. For every connection made to a remote PC, the RDP client in Windows (mstsc.exe) saves the computer name or an IP Address and also the username used to log on. See the following guide on…
In this guide, we will discuss “PetitPotam attack on AD Certificate Services: mitigate NTLM”. Recently, Lionel Gilles, a French-based Offensive Computer Security researcher based in Paris, France published a PoC tool on NTLM Relay Attacks known as PetitPotam that exploits the MS-EFSRPC (Encrypting File Services Remote Protocol). Here is an example of such documents: NT LAN Manager:…
In this article, we shall discuss the fix to “The sign-in method you are trying to use is not allowed: For more information, contact your network administrator”. This error is a little bit self-explanatory. Please see How to create a contact in Active Directory, and How to Lock the Find My Device Option in Windows…
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When this error message pops up, users are unable to sign-in to their devices in the domain. “We can’t sign you with this credential because your domain isn’t available. Make sure your device is connected to your organization’s network and try again. If you previously signed in on this device with another credential, you can…
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In this article, you will learn how to fix “The following errors occurred attempting to join the domain: The specified domain either does not exist or could not be contacted”. An Active Directory domain is a collection of objects within a Microsoft Active Directory network. Please see how to schedule and run Windows Update via Windows Admin Center,…
In this article, we shall discuss ‘Error: The processing of Group Policy failed because of lack of network connectivity to a DC. This may be a transient condition. A success message would be generated once the machine gets connected”. This error implies that a Windows client machine is unable to communicate with a Domain Controller…
A domain controller (DC) is a server computer that responds to authentication requests. It participates in the replication and contains a complete copy of all directory information for their domain. If your environment requires high availability of IT systems when one DC fails, another takes over to ensure successful login, etc. Please see this guide…
In this article, we will discuss Active Directory: How to Setup a Domain Controller. A domain controller (DC) is a server computer that responds to authentication requests. It participates in the replication and contains a complete copy of all directory information for its domain. Please see this guide for how to add a second DC…
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When the following error is prompted “You must specify user account name when adding a DC to an existing Forest”. This is because, when adding a new Domain Controller (DC) to an existing Active Directory (AD) forest. You must provide the credentials of a user account with sufficient privileges. Please see Active Directory: How to…
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