Exchange 2010 supports access to mailboxes on Exchange 2010 servers through Exchange 2010 Client Access servers.

Most organizations find that the default Outlook Web App virtual directory that's created during installation of the Exchange 2010 Client Access server role is sufficient. You may not need to create new Outlook Web App virtual directories. Generally, new Outlook Web App virtual directories are created by businesses that provide hosting or for troubleshooting issues, such as the deletion and re-creation of Outlook Web App virtual directories.

Note:
You can’t create more than one Outlook Web App virtual directory in a site. To create multiple Outlook Web App virtual directories, you must create additional sites in IIS Manager.

Perform the following tasks on Outlook Web App virtual directories, depending on the needs of your organization.

• Create a new Outlook Web App virtual directory   You can use the Exchange Management Shell to create a new Outlook Web App virtual directory. For more information, see Create an Outlook Web App Virtual Directory.
  
  

  Note:
  When the Client Access server role is installed, the Outlook Web App virtual directory is installed under the default Web site. All new virtual directories are installed under the default Web site unless a different Web site is specified when the virtual directory is created.

• View or configure properties of an Outlook Web App virtual directory   You can use the Shell and the EMC to view or configure the properties of an Outlook Web App virtual directory. For more information, see View or Configure Outlook Web App Virtual Directories.
  
  
• Manage properties on an Outlook Web App virtual directory    If you're running only the Client Access server role on a computer, you manage the properties of the virtual directories from the Outlook Web App tab in the EMC. You can access the Outlook Web App tab by clicking Server Configuration and then clicking Client Access.