<p>I have had a few people ask me about why certain features are not available on BlackBerry 10 connected to Microsoft Exchange using ActiveSync. I have been using this relatively updated list on Wikipedia for awhile but turns out there is a document directly from BlackBerry detailing the features. The features are all based on the version of ActiveSync available in each version of Microsoft Exchange. For example, on Exchange 2003 you will not have access to server side email searching. Or even more common of a question is the fact that you need Exchange 2010 for free/busy lookups.</p><p>Check out the listing below:</p><p>Microsoft ActiveSync 2.5 with Microsoft Exchange Server 2003 SP2</p><p>Functional limitations and known issues exist when BlackBerry ActiveSync client in BlackBerry 10 smartphone utilizes ActiveSync protocol connection to Microsoft Exchange Server 2003 SP2.</p><p><a href="https://www.berryreview.com/2014/01/08/blackberry-details-activesync-features-for-each-version-of-microsoft-exchange-blackberry-10/">Keep reading...</a></p>