Alternate Access Mapping (AAM) is alternate URL address defined to access the same SharePoint site. For example, if you have SharePoint site to serve internal and external users – then you will consider AAM. Using AAM – we can also define different authentication method to the incoming request. For example, internal user will use Windows Integrated Authentication – while external user will use Form Based Authentication.
How-to configure alternate access mapping?
2. In “Operations” page click on “Alternate access mappings” link.
3. You will see list of existing URLs with existing AAM (if any). Click on “Show All” combo box to “Change Alternate Access Mapping Collection”
4. Select the Web Application to which you want to modify the AAM.
5. Click on “Add Internal URLs” to add new AAM ( or “Edit Public URLs’ to edit existing one).
6. Type in the URL protocol, host and port – as alternative address for your users. For example, http://extranet.someserver.com.
Select the zone for the URL, (Intranet, Internet, Custom, Extranet, Default).
Then, click “Save”
7. Now you can see new alternate URLs to access SharePoint site.