Topic Last Modified: 2011-02-10
You can use CNAME records to let Outlook clients connect to the cloud-based service by using the Autodiscover service.
What is a CNAME record?
A CNAME or canonical name record is the DNS equivalent to a Microsoft Windows shortcut or an Apple Mac alias. A CNAME record is an alias for the Address (A) record that maps an IP address to the target server.
The target server doesn’t have to exist in the same domain as the CNAME record itself. You can define an alias in one domain to point to a target server in a completely different domain. Many organizations use CNAME records with Web servers. An organization might point the alias
www to a Web server that is hosted by a dedicated Web hosting company. For example, requests for
www.contoso.com can be redirected to
What do I need to support Outlook clients?
The cloud-based service uses a CNAME record to implement the Autodiscover service for Outlook clients. The Autodiscover service lets users configure their Outlook profile settings by simply entering their e-mail address and password into Outlook.
The Autodiscover CNAME record must contain the following information:
Help for your users
After you’ve created the
autodiscover CNAME record, point your users to Connect Outlook to This Account to help them connect.
Two things to be aware of:
- Manual configuration of Outlook is not supported. You have to create the
autodiscoverCNAME record if you want to use Outlook. Why? By harnessing Microsoft Exchange Autodiscover functionality, the cloud-based service can update the server infrastructure, such as the location of mailboxes, without affecting your users e-mail experience. That’s a good thing.
- The cloud-based service only supports Outlook 2007 and Outlook 2010.
For more information please see: http://onlinehelp.microsoft.com/en-us/office365-enterprises/ff637585.aspx#BKMK_Configure