Topic Last Modified: 2017-03-15

Used to assign the default realm (SIP Communications Service) to a collection of proxy configuration settings. Realms (also known as protection domains) are used to authenticate user credentials during logon. This cmdlet was introduced in Lync Server 2010.


The command shown in Example 1 assigns the default realm (SIP Communications Service) to a variable named $x.

$x = New-CsSipProxyUseDefault

Proxy servers provide a way for users outside your internal network to access resources on your internal network. Each proxy server must be associated with a realm; realms (also known as protection domains) indicate where a user’s logon credentials should be processed. By default, Skype for Business Server 2015 uses SIP Communications Service as its default realm; however, it is possible to change the realm employed by a proxy server. If you change the realm and then want to revert back to using the default realm, you can do so by creating a SipProxy.UseDefault object, and then assigning that object to the Realm property of the appropriate proxy server (or servers).


Parameter Required Type Description

This cmdlet provides only common Windows PowerShell parameters.

None. The New-CsSipProxyUseDefault cmdlet does not accept pipelined input.

The New-CsSipProxyUseDefault cmdlet creates new instances of the Microsoft.Rtc.Management.WritableConfig.Settings.SipProxy.UseDefault object.