Windows 8.1 “No terminal server license servers available”

After a couple days of using Windows 8.1 I suddenly got an error when connecting with Citrix or a normal remote desktop session. Both the applications gave the error that there were no terminal server license servers available, which prevented me from connecting.

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(Microsoft) Vendor specific DHCP options explained and demystified

DHCP servers can send vendor specific options to clients to granularly control configuration. Microsoft clients are out-of-the-box prepared to receive Microsoft Windows specific options while Microsoft DHCP servers have the ability to send DHCP options only received by Windows clients.

Some applications use the content of a DHCP option to receive configuration data, for example Microsoft Lync or RES Workspace Manager. Since this applications only run on Microsoft Windows its no more than logical to only send this option to Windows clients.

In this article I’ll explain how this mechanism works and how you can send Microsoft Windows specific DHCP options from a non-Microsoft DHCP server (like a Linux or Lucent-Alcatel VitalQIP appliance).

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Citrix: Export to network drive really slow

For one of our customers I was asked to troubleshoot an application that exports data to several file types, including Microsoft Excel’s XLS file type.


The client runs Citrix XenApp 5 on Windows Server 2003 (x86). All user homedrives are mapped to the H-drive.


The application lets you perform queries on your Oracle database, analyze and format the results and prepare those for presentation. When the application exports an XLS-file to the H-drive, it freezes for 5 minutes and then responds normally again. However, when the same application exports a TXT- or CSV-file to the same drive, it freezes for just a few seconds.

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Microsoft is calling: You're computer is having problems! (Phone scam)

Last week my wife got a call from from a person claiming to be working for Microsoft, and apparently they are receiving reports that there is something wrong with my computer! She told them that she does not need any help because she is married to an IT guy! But today I got the call and it seems it is the same guy because of his Indian accent!  Their phone number is blocked and the person is very pushy! But I thought lets play along!

“Microsoft Guy”: are you working on your computer now?
My answer :Yes.
“Microsoft Guy”: I can see you a running Windows now!
My answer:  Yes (but this is what I was running at the moment:)

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CRM 2011 – Outlook plugin: Cannot connect to Microsoft Dynamics CRM server because we cannot authenticate your credentials

Author: Daniel Nikolic

When installing the Microsoft Dynamics CRM 2011 plugin for Outlook on a Windows 8 machine it’s possible that you receive error:

“Cannot connect to Microsoft Dynamics CRM server because we cannot authenticate your credentials. Check your connection or contact your administrator for more help.”

In the logfile ‘C:\Users\%USERNAME%\AppData\Local\Microsoft\MSCRM\Logs\Crm50ClientConfig.log’ we see the following error message:

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Our partner Denamik has released Denamik LoadGen 2.3

Our partner Denamik has released a new version of Denamik LoadGen. The execution of massive load and stress tests is now easier than before. You can now record your own user action scripts from within LoadGen, and setup LoadBots to handle the execution of these scripts. LoadGen allows you to manage LoadBots to create remote sessions and evaluate your IT environment under stress. A built-in reporting facility will give you instant results.

What is new in LoadGen 2.3:

  • Rewrite of installation and activation of LoadBots
  • Rewrite of internal functions of the DUAF language to speed up interaction with XenApp desktops
  • Introducing the possibilities to add your own libraries to DUAF scripts

Feel free to check out Denamik LoadGen 2.3, it’s free up to 15 virtual users.

‘Microsoft Outlook’ exited without properly closing your Outlook data file

After an Outlook crash the following error message can occur:

Outlook Data File
‘Microsoft Outlook’ exited without properly closing your Outlook data file ‘LocationOfOST.ost’. ‘Microsoft Outlook’ must be restarted. If this error message recurs, contact support for ‘Microsoft Outlook’ for assistance.

And followed by:
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Why is it so hard to find unread messages in Outlook 2010?

In many past versions of Microsoft Outlook there was a simple list of message views available and one of the choices was ‘Unread Messages’. It’s a popular option because many people use the Read/Unread status to mark messages that need action (eg reply, forwarding etc).

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Moving the ISTG role to another domain controller

On a customer site we have multiple Windows 2003 domain controllers in an single AD site. One of the domain controllers has connection problems this causes authentication problems because the troubled server has the Inter-Site Topology Generator (ISTG) role. The server with the ISTG role is responsible for managing the inbound replication connection objects for all bridgehead servers in the site in which it is located.

To end the authentication problems I want to move the ISTG role from server02 to dc001. When you open the Active Directory Sites and Services console. In this console you open the troubled site. When you open the site, you see in the right pan NTDS Site Settings.


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Error 193: 0xc1 when starting a service

Out of the blue I was getting the following error:

Windows could not start the ServiceName service on Local Computer.

 Error 193: 0xc1

Check the Path where the service has been installed: example: C:Program FilesApplication NameServiceName.exe

This error has something to do with a file in the root of one the folders with a ‘ ‘ (space) in it. So:

  • C:Program
  • C:Program FilesApplication

Remove the file and voila…

Daniel Nikolic