On the site administrator Home
page, in the Microsoft DNS area,
click list zones. The List of
DNS Zones page opens and displays a list of DNS zones for the site.
On the DNS zones
list page,
the zone for which you want to add an alias (CNAME) record, then click
list records on the action bar
directly above the form. The List Records page opens and displays a list
of existing DNS records for the selected zone.
On the List Records
page, click add cname record.
In the alias
name text box, enter an alias host name. The current domain name
(displayed next to the text box) is appended to the host name.
In the fully
qualified name for target host text box, enter the target host
name.
Click add.