DNS Requirements for Standard Edition Servers

Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.

 

Topic Last Modified: 2015-03-09

This section describes the DNS records that are required for deployment of Standard Edition servers.

DNS Records for Standard Edition Servers

The following table specifies DNS requirements for Office Communications Server 2007 R2 Standard Edition server deployment.

Table 3. DNS Requirements for a Standard Edition Server

Deployment scenario	DNS requirement
Standard Edition server	An internal A record that resolves the FQDN of the server to its IP address.
Automatic client logon	For each supported SIP domain, an SRV record for _sipinternaltls._tcp.<domain> over port 5061 that maps to the FQDN of the Standard Edition server that authenticates and redirects client requests for sign-in. For details, see DNS Requirements for Automatic Client Sign-In.
Device Update Service discovery by UC devices	An internal A record with the name ucupdates-r2.<SIP domain> that resolves to the IP address of the Standard Edition server hosting Device Update Service. In the situation where an Office Communications Server 2007 R2 UC device is turned on, but a user has never logged into the device, the A record allows the device to discover the server hosting Device Update Service and obtain updates. Otherwise, devices obtain the server information though in-band provisioning the first time a user logs in. For details, see Device Update Service. Important If you have an existing deployment of Software Update Server in Office Communications Server 2007, you have already created an internal A record with the name ucupdates.<SIP domain>. For Office Communications Server 2007 R2, you must create an additional DNS A record with the name ucupdates-r2.<SIP domain>.
A reverse proxy to support Web conferencing for external users as well as access to Device Update Service by external UC devices	An external A record that resolves the external Web farm FQDN to the external IP address of the reverse proxy. Clients and UC devices use this record to connect to the reverse proxy. For details, see DNS Requirements for External User Access.