In earlier versions of Exchange you can use the Autodiscoverredirect option to retrieve autodiscover information if your primary SMTP domain in your email address does not match the domain name of the autodiscover DNS record in your Exchange deployment. You’ll face this issue when your Client Access server is using webmail.contoso.com and autodiscover.contoso.com but your email address is email@example.com. In this case your Outlook client will automatically start looking for a DNS record called autodiscover.fabrikam.com which points to the autodiscover.contoso.com. As a result a certificate warning is presented since the name of the request does not match the name on the certificate.
An additional application next to Exchange Server 2013 is a new server product called Office Web Apps 2013. The Office Web Apps server can be used to render Microsoft Word, Excel and Powerpoint file types. Other than this the Office Web Apps server is used by Exchange Server 2013 to provide the Web Ready Document Viewing, something that was made available by Exchange Server 2010 natively (although a non-Microsoft engine was used to achieve this).
Installing Office Web Apps 2013
Office Web Apps 2013 can be installed on Windows Server 2012 or on Windows Server 2008 R2, but I prefer the first (due to support lifecycle). If you plan to use the latter make sure that you install the .NET Framework 4.5 and Powershell 3.0, these are installed by default on Windows Server 2012.