This feature is not supported in the Professional version. The most apparent of the other differences is that the Standard version (like prior versions) still creates automatic links for telephone numbers in Tasks and Appointments, which allows for the easier click and dial of stored telephone numbers within these Outlook items.

Domain Enroll is functionality to connect the device to System Center Mobile Device Manager 2008, a product to manage mobile devices. Several other changes such as threaded SMS, full page zooming in Internet Explorer and 'Domain Enroll' were also added, along with a 'mobile' version of the Microsoft OneNote program and an interactive 'Getting Started' wizard. This was not supported in the Professional edition. It is a minor upgrade to the Windows Mobile 6 platform with various performance enhancements and a redesigned Home screen featuring horizontal tiles that expand on clicking to display more information, although this new home screen is featured only on Windows Mobile Standard edition.

Windows Mobile 6.1 was a version of the Windows Mobile operating system, released on April 1, 2008.

Microsoft activesync windows mobile 6.1