Set up DNS records for Cloud Office Skype for Business

This article describes how to set up DNS for the Skype for Business offering from
Rackspace Cloud Office. If you need to configure your DNS for Rackspace Cloud
Office email products, see Set up DNS records for Cloud Office email.

Prerequisites

• Applies to: Administrators
• Difficulty: Moderate
• Time needed: Approximately 30 minutes to configure and an additional 24-48 hours to propagate
• Tools required: DNS host administrator access

For more information on prerequisite terminology, see Cloud Office support terminology.

Set up DNS records for Skype for Business

To configure your hosted implementation of Microsoft Skype for Business, formerly
Microsoft Lync, you must set up DNS records. The following CNAME and SRV records
must be in place to enable Skype for Business to work with the Hosted Exchange
environment.

CNAME records

• autodiscover.example.com
• lyncdiscover.example.com
• sip.example.com

SRV records

• _sip._tls.example.com
• _sipfederationtls._tcp.example.com

Because of the nature of our hosted environment, the domain listed for the CNAME
records contains specific Skype for Business DNS records. Use our help tool
for the specific DNS records for your domain.

After you log in with a mailbox that is enabled for Skype for Business, you can
find the DNS settings through the Help Tool
as shown in the following image.

If you know exactly which Exchange environment your domain is hosted on, you can
locate your specific records in the tables below.

mex06.emailsrvr.com

mex08.emailsrvr.com

mex09.emailsrvr.com

Note: If you have an internal DNS, you must also set up these records on
your internal DNS. If you want to enable Skype for Business federation with
domains that are hosted outside of Rackspace or domains that are hosted within
Rackspace, contact our Support team to learn more.

Related article

Set up DNS records for Cloud Office email