What is Outlook Anywhere and describe the method for enabling Outlook Anywhere?

Outlook Anywhere feature (previously known as RPC over HTTP) provide a facility to connect your Internet-based Microsoft Outlook clients to connect to your Exchange Server 2007. This featureeliminates the need to use virtual private networks (VPNs) if Exchange server 2003 with Sp1 and Exchange 2007.

Outlook Anywhere can be enabled by using the 

Exchange Management Console

Open Exchange Management console tree > expand Server Configuration > then click Client Access. 

In the action pane, click Enable Outlook Anywhere.

Exchange Management Shell

Enable-OutlookAnywhere -Server: <ServerName> -ExternalHostName: <ExternalHostName> -ClientAuthenticationMethod:Basic -IISAuthenticationMethods <MultiValuedProperty> -SSLOffloading:$false

Requirement of Outlook anywhere

 Install a valid Secure Sockets Layer (SSL) certificate from a trusted certification authority (CA).

 Install the Windows RPC over HTTP Proxy component