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Posts published in “Archives: Troubleshooting”

Change the DNS cache duration of DFS Namespaces

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Presentation In this article, I will explain how to change the DNS cache of a namespace. By default, the DNS cache is 300 seconds or 5 minutes. For example, during a server migration, it may be necessary to reduce the client cache. Change the duration Open the DFS Distributed File System Management console, right-click the name 1 and click Properties…

WDS Boot PXE: Fix the 0xc0000001 Error

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Symptom When you try to start a computer in PXE from a WDS server, the following error is displayed when loading the image: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1. Insert your Windows installation disc and restart your computer. 2. Choose your language settings, and then click “Next.”…


SQL Server configure remote access

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This article describes how to configure remote access to a SQL Server (EXPRESS). 1. Open the SQL Server Configuration Manager. 2. Go to SQL Server Network Configuration / Protocols for SERVER NAME, then right-click TCP / IP and click Properties. 3. Go to the IP Addresses 1 tab and then search for the IPAll 2 section. Enter the port number…

DFS replication resolve error 4012

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This article describes how to troubleshoot the DFS Replication Service 4012 error. In the Windows event log you have an error like this: The DFS Replication service stopped replication on the folder to the following local path: C: \ Windows \ SYSVOL \ domain. This server was disconnected from the other partners for a period of 690 days, which is…

WSUS: Fix the problem of downloading Windows 10 updates

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The upgrades of Windows 10 are distributed using an .ESD file. By default, the WSUS server (IIS) does not process requests on ESD files and this fact in the Windows Update Manager updates remains at 0% download. To solve this problem, it has the MIME type declared in IIS. 1. Go to the IIS console of the WSUS server, select…

Office 365 with Active Directory Synchronization: Add an Alias to a Mailbox

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To add an alias to a mailbox in an Office 365 environment whose Active Directory is synchronized, you must use the local directory (On Premise) to add the alias in the proxyaddresses attribute. 1. Open the Active Directory Users and Computers console and verify that the Advanced Features view is enabled 1 . 2. Right-click on the user 1 then…

Kemp: solve the problem of mixed content

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If you use Kemp to dump to pass an internet site in HTTPS, it is possible that part of the content of the site (images, css, js) does not appear, the browser returns a Mixed Content error, it means that calls to resources are made in HTTP. To solve this problem, one must make a rule that will rewrite the…

Remote Desktop: CredSSP Error

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When connected in Remote Desktop, the following error is displayed: An authentication error has occurred. The requested function is not supported Remote computer: IP or FQDN The problem may be due to a CredSSP encryption oracle fix To solve there are several solutions. Solution 1: Disable NLA Authentication On the server where the connection must be established disable 1 NLA…

Delete a backup control point in Hyper-V without a delete option

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It happens in Hyper-V that a third-party software (backup) create a control point that is not possible to delete through the GUI. You have to switch to PowerShell to delete the control point. 1. Open a PowerShell administrator window and enter the following command to display the snapshots. Get-VMSnapshot -ComputerName <SERVER-HYPER-V> -VMName <VM> This should display the control points of…

Windows Cluster change the IP owner

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In some situations, it may be necessary to change the owner of the IP address carried by a Windows cluster. Example: on an Exchange DAG if the cluster ip is used for connections to Outlook, SMTP … 1. Open a PowerShell window as an administrator. 2. Import the administration module if necessary. import-module failovercluster 3. Enter the following command to…

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