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Mailbox servers in your organization only require the default self-signed SSL certificate. The only post-deployment task you must perform to successfully use Outlook Anywhere is to install a valid SSL certificate on your Client Access server. In Exchange 2013, Outlook Anywhere is enabled by default, because all Outlook connectivity takes place via Outlook Anywhere.

You can test end-to-end client connectivity for Outlook Anywhere and TCP-based connections by using the Test-OutlookConnectivity cmdlet. If you already use Outlook Web App with SSL or Exchange ActiveSync with SSL, you don't have to open any additional ports from the Internet. You don't have to use a virtual private network (VPN) to access Exchange servers across the Internet. Unauthenticated requests from Outlook can't access Exchange servers. You can use the same Secure Sockets Layer (SSL) server certificate that you use for both Outlook Web App and Exchange ActiveSync. You can use the same URL and namespace that you use for Outlook Web App and Microsoft Exchange ActiveSync. Users have remote access to Exchange servers from the Internet. Outlook Anywhere offers the following benefits to clients that use Outlook 2013, Outlook 2010, or Outlook 2007 to access your Exchange messaging infrastructure: In Exchange 2013, this feature is enabled by default, because Exchange 2013 doesn't allow direct RPC connectivity. This allows traffic to traverse network firewalls without requiring RPC ports to be opened. The Windows RPC over HTTP Proxy component, which Outlook Anywhere clients use to connect, wraps remote procedure calls (RPCs) with an HTTP layer.

This topic describes the Outlook Anywhere feature and lists the benefits of using Outlook Anywhere.

In Microsoft Exchange Server 2013, the Outlook Anywhere feature, formerly known as RPC over HTTP, lets clients who use Microsoft Outlook 2013, Outlook 2010, or Outlook 2007 connect to their Exchange servers from outside the corporate network or over the Internet using the RPC over HTTP Windows networking component.