Extend a web application in SharePoint

In some scenarios, you may need to share the same content to different types of users [Internal / External] through different URLs or different authentication types. In this case, you will need to extend your SharePoint web application.

Before we getting started to review the Extend web application steps, you should be aware of:

  • When the web application has been extended, a different Web Application and IIS have been created.
  • The main Web Application and the extended one will share the same Content Database.
  • You can extend the web application to change the port number. Meanwhile, you can extend the web application to port 80 in case you use Host Header.
  • Extending web application is used for extranet deployments in which different users access to the same content through different domains and different authentication type.

Below, I will show the simple steps to extend a SharePoint web application.


  • Open Central administration –> Application Management –Manage web applications.


  • Select the source web application and from the ribbon click on Extend.

extend web application

  • The following dialog should be shown to type the new port for a new web application.

extend web application 1

Enjoy 🙂

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