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I &nbsp;need to change exchange 2003 to native mode to upgrade to exchange 2010 any risk? <a href="https://filedb.experts-exchange.com/incoming/2011/05_w20/458026/mixed-mode-Capture.PNG" target="_blank" title="c vfb (4 KB)"><img alt="c vfb" class="file-block lazyload" style="max-width: 697px;" data-src="https://filedb.experts-exchange.com/incoming/2011/05_w20/458026/mixed-mode-Capture.PNG" /></a>
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I  need to change exchange 2003 to native mode to upgrade to exchange 2010 any risk? 

change exchange 2003 to native mode any risk

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Microsoft server applications are those applications developed specifically, but not necessarily exclusively, on the Windows Server platform. In addition to well-known products like SQL Server, Exchange, Internet Information Services (IIS), Microsoft Dynamics, Forefront, Lync and Sharepoint, they include applications like Skype, BizTalk, Hyper-V, Groove and Commerce Server. Server applications are managed with the Microsoft System Center.