This script disables the EKU check for Lync/SfB Web Conferencing Service.

Lync/SfB Server: Event 41026, LS Data MCU after May 2017 .NET Framework update

Installation Options

Copy and Paste the following command to install this package using PowerShellGet More Info

Install-Script -Name Disable-csWebConfEKUCheck

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Manually download the .nupkg file to your system's default download location. Note that the file won't be unpacked, and won't include any dependencies. Learn More


Package Details


  • David Paulino


Certificates Lync LyncServer SkypeForBusiness SfBServer Registry


This script has no dependencies.

Release Notes

Version 1.0 – 2017/05/24 - Initial release.
Version 1.1 – 2017/05/30 - Additional check if the registry key was previously configured.
Version 1.2 - 2017/06/02 - Check if the Front End has a Edge Pool associated for media and if the Certificate already includes Client and Server Authentication in EKU.
Version 1.3 - 2017/06/27 - Added switch type Dword to Set-ItemProperty.
Version 1.4 - 2019/01/07 - Fixed issue if path was not found while adding the reg key.
Version 1.5 - 2023/10/06 - Updated to publish in PowerShell Gallery.


Version History

Version Downloads Last updated
1.4 (current version) 13 10/6/2023