Category Archives: Microsoft

Configuring Citrix Web Interface and Load Balancing with Windows NLB

To configure Windows server 2008 R2 to load balance Citrix Web Interface 5.x is very simple procedure. The following procedure describes the basic steps involved.

Configure Citrix Web Interface

Open the Citrix Web Interface Management console

Click “XenApp Web Sites” and click “Create Site”

Modify the IIS site settings if required

Click “Set as the default page for the IIS site”

Specify the point of the authentication as “At Web Interface”

Click “Next” to finish creation of the site

Once the site is successfully created click “Next” to configure the site

Specify the Citrix Farm name, Citrix Servers and the XML port

Continue reading Configuring Citrix Web Interface and Load Balancing with Windows NLB

Troubleshooting WSUS

Clients disappearing from WSUS Console

Client computers registered in the WSUS console appeared to disappear / overwrite each other. Research revealed this was related to the fact the OS was imaged and the servers had an identical “SusClientID” registry key entries.

To resolve this issue, perform the following steps

  • Delete the SusClientId registry key

reg delete “HKLM\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate” /v SusClientId /f

  • Restart the “Windows Update” service

net stop wuauserv
net start wuauserv

  • Reset the WSUS authorization. From a command line enter the following command

wuauclt /resetauthorization /detectnow

Automatic Update client unable communicate with WSUS Server – Error 80072ee2

Several computers (all running Server 2008) failed to communicate with the internal WSUS server. The servers were not experiencing any networking problems and there was no firewall blocking traffic. Checking the C:\Windows\WindowsUpdate.log revealed the following error message.

WARNING: SendRequest failed with hr = 80072ee2. Proxy List used: <>

Researching the issue revealed that Window Update does NOT rely on Internet Explorer’s Proxy server settings (which in this instance were blank) but rather the WinHTTP service. This service is configured via netsh.

  • Run “netsh winhttp show proxy” to show the whether WinHTTP proxy is configured

  • Run “netsh winhttp reset proxy” to connect to Internet directly without using any kind of proxy server.
  • Force Update detection by running “wuauclt /detectnow” from a command prompt

Checking the WindowsUpdate.log file again, browse to the end of the log file should start logging entries

2012-02-22    14:17:54:295     780    d5c    AU    Triggering AU detection through DetectNow API

2012-02-22    14:17:54:295     780    d5c    AU    Triggering Online detection (non-interactive)

2012-02-22    14:17:54:295     780    1fd4    AU    #############

2012-02-22    14:17:54:295     780    1fd4    AU    ## START ## AU: Search for updates

2012-02-22    14:17:54:295     780    1fd4    AU    #########

Check the WSUS console after a period of time will hopefully reveal the client server is now able to communicate successfully.

Configuring Windows Server 2008 R2 Roles via Powershell


The following commands are useful when

  • Open Powershell
  • Type “Import-Module servermanager” to import the servermanager module into powershell. Failure to do so will mean the following commands will not work.
  • To list the Roles type “Get-WindowsFeature“.

  • To install a Windows Role type “Add-WindowsFeature NAME”. NAME refers to the name of the Role listed under the Name column when the Get-WindowsFeature command was run.
  • To install multiple Roles at the same time simple put a comma between role names

E.g. Add-WindowsFeature DHCP, Print-Server

  • To remove an installed Role simply type “Remove-WindowsFeature NAME”