Microsoft released Windows 8.1 Preview (x86 and ARM) a day before yesterday during BUILD 2013 keynote at Moscone Center in San Francisco. The Redmond giant has also integrated pre-release version of Outlook 2013 RT with Windows 8.1 RT for ARM users.

Outlook 2013 RT has been loudly requested by companies, but compared to x86 version, many Enterprise features are absent. The reason being tablets to have a special need of security and mobility. That’s why, all apps including Outlook 2013 RT doesn’t allow installation and execution of macros, add-ins and custom programs developed in VBA (Visual Basic for applications).

Outlook 2013 RT can be connected to Exchange Sever 2007, 2010 and 2013 but doesn’t support the Online Archive or Personal mailboxes or Site mailboxes. The application doesn’t support set Information Right Management on new email messages and configuration through Group Policy. In addition, the application also lacks the ability to add a fax account, integration with Lync and SharePoint, and Windows Media Player for functioning of voice mail.

In order to avail all these features, it is mandatory to have a copy of Office 2013 installed on you PC or tablet with Windows 8.

Microsoft also clarified licensing terms related to the new Outlook RT in a blog post

“Windows RT 8 and Windows RT 8.1 Preview ship with Office Home & Student. If your organization also purchased commercial use rights or has a commercial license to Office 2013 suites that include Outlook, your users can use Outlook 2013 RT to get to business on their RT devices too.”

The preview release of Outlook 2013 RT works pretty well, but it will be further updated and improved in the coming months until the final release of Windows 8.1 RT. Clearly, unlike Skype which will replace the Messaging app, Outlook 2013 RT will work as a complement to the Mail app.