Lync 2013 will not replicate CMS

After you installed Lync 2013 on a Windows 2012 / Windows 2013 R2 Configuration management store will not replicate.

You think that it has something to do with the certificates but they seem ok. You will probably try to genereate new certificates to be sure, no… did’t help.

 The reason is the new way Windows 2012 handles the certificate store. For a technical description have a look at Technet article : .

If you just want things to start working add this registry key :

REG_DWORD “ClientAuthTrustMode” under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel and set it to value = 2 .

Or run this PowerShell command from an elevated PowerShell prompt:

New-ItemProperty -Path HKLM:\system\CurrentControlSet\Control\SecurityProviders\SCHANNEL

-Name ClientAuthTrustMode -Value 2 -PropertyType DWORD


The trust mode controls how validation of the client’s certificate chain is performed .

Contributed by Jan Helge Austbø

Leave a Reply