Howto: Configure Alternate Access Mapping


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?

1. Open “Central Administration”  web and click on “Operations” tab.


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,

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.


Happy configuring.

3 thoughts on “Howto: Configure Alternate Access Mapping

  1. Pingback: Howto Series : Administration « Ideas for free

  2. Hi,
    Thank you for your information, I have created an intranet portal in share point & URL is http://servername:550. All the users in the office where share point server is situated are accessing the site very friendly.
    But now i want to access the intranet site from outside world like from my home. Is this possible by using Alternate Access Mapping?

    Please help me to do this, It is very important?

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