Topic Last Modified: 2015-03-09

Removes a SIP domain previously configured 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.

Remove-CsSipDomain -Identity <XdsGlobalRelativeIdentity> [-Confirm [<SwitchParameter>]] [-Force <SwitchParameter>] [-WhatIf [<SwitchParameter>]]

Example 1 removes the SIP domain with the Identity from the list of supported domain names. Note that this command will fail if is the only SIP domain currently in use in your organization. That’s because your topology must include at least one SIP domain.

Remove-CsSipDomain -Identity

The command shown in Example 2 deletes all the SIP domains in your organization except for the default domain. To do this, the command first calls the Get-CsSipDomain cmdlet in order to return a collection of all your SIP domains. This collection is then piped to the Where-Object cmdlet, which picks out only those domains where the IsDefault property is not equal to True. The net effect: the default domain is filtered out, and the remaining domains are then piped to the Remove-CsSipDomain cmdlet and deleted.

Get-CsSipDomain | Where-Object {$_.IsDefault -ne $True} | Remove-CsSipDomain

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. This is something you can do by running the New-CsSipDomain cmdlet.

After a SIP domain has been authorized, it can be "unauthorized" by using the Remove-CsSipDomain cmdlet. This cmdlet removes the specified domain from the list of approved SIP domains. Note, however, that you cannot remove the default domain; if you need to do this, you will first have to configure another SIP domain to act as the default domain. If you only have one SIP domain, that domain will automatically be configured as the default domain, and you will not be able to remove it.

In addition, you cannot remove any SIP domain that has one or more SIP addresses assigned to it. For example, you cannot remove as a SIP domain if Ken Myer has the SIP address "". To remove a SIP domain currently in use, you must first assign new SIP addresses to all the users who have that domain in their SIP address.


Parameter Required Type Description




Fully qualified domain name (FQDN) of the SIP domain to be removed: 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.




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

Microsoft.Rtc.Management.Xds.SipDomain object. The Remove-CsSipDomain cmdlet accepts pipelined instances of the SIP domain object.

None. Instead, the Remove-CsSipDomain cmdlet deletes existing instance of the Microsoft.Rtc.Management.Xds.SipDomain object.