<p>Exchange Server 2013 hit general availability this week, but organizations must wait for service packs and updates before they can upgrade.</p><p>Companies on Exchange Server 2010 must wait for Service Pack 3 to be released in order to achieve complete Exchange 2013 and Exchange 2010 coexistence. Similarly, organizations on Exchange Server 2007 must wait on a rollup that will include the same functionality. Both Exchange 2007 and Exchange 2010 must coexist with Exchange 2013 before all data is completely migrated to Exchange Server 2013.</p><p>Exchange Server 2013 includes several new aspects that should make both administrators and users happy.</p><p>The Exchange server role architecture has been consolidated from five roles (unified messaging, hub transport, edge transport, client access and mailbox) down to two (client access and mailbox). Fewer server roles will make for easier Exchange 2013 deployments.</p><p><a href="http://searchexchange.techtarget.com/news/2240173874/Exchange-Server-2013-hits-general-availability-but-upgrades-must-wait">Keep reading...</a></p>