Topic Last Modified: 2017-03-28

Creates a new SIP domain for use in your organization. SIP domains are domains authorized to send and receive SIP traffic, and are used when assigning SIP addresses to users. This cmdlet was introduced in Lync Server 2010.

New-CsSipDomain -Identity <XdsGlobalRelativeIdentity> [-Confirm [<SwitchParameter>]] [-Force <SwitchParameter>] [-IsDefault <$true | $false>] [-WhatIf [<SwitchParameter>]]

The command shown in Example 1 creates a new SIP domain, one that has the Identity

New-CsSipDomain -Identity

Example 2 creates a new SIP domain named and makes this new domain the default SIP domain. By making the default domain, this command also "demotes" the domain that previously served as the default SIP domain. That’s because you can have only one default SIP domain.

New-CsSipDomain -Identity -IsDefault $True

In order to configure SIP addresses for your users (and thus enable them to use SIP-related software such as Skype for Business), you need two pieces of information: a user ID (for example, Ken.Myer) and a SIP domain (for example, The SIP domain used to construct a SIP address must be a domain, located within your Active Directory forest, that is authorized to send and receive SIP traffic. For example, suppose you have domains named,, and, but only has been identified as being a SIP domain. In that case, you cannot use a SIP address like or, at least not until and have been configured as valid SIP domains. That is something you can do by running the New-CsSipDomain cmdlet.


Parameter Required Type Description




Fully qualified domain name (FQDN) for the new SIP domain. For example:





Prompts you for confirmation before executing the command.




Suppresses the display of any non-fatal error message that might occur when running the command.




Indicates whether the domain is the default SIP domain, the domain used by Skype for Business Server 2015 any time a domain name is not explicitly stated. If set to True, the new domain will also become the new default domain

The default value for IsDefault is False. If you do not want to make the new domain the default domain you can simply leave out the parameter.

If you change the default SIP domain you will need to restart the RTCCAA and RTCCAS services.




Describes what would happen if you executed the command without actually executing the command.




PARAMVALUE: $true | $false

None. The New-CsSipDomain cmdlet does not accept pipelined data.

The New-CsSipDomain cmdlet creates new instances of the Microsoft.Rtc.Management.Xds.SipDomain object.