A quick post, but helpful for all those involved with designing and drawing out infrastructure diagrams related to Microsoft Exchange Server. Microsoft published Visio stencil with shapes for Microsoft Exchange Server 2010 (RTM and SP1). These shapes include icons for the following:

• Exchange 2010 server roles
• Features new to Exchange 2010 SP1
• Networking, telephony, and Unified Messaging objects
• Active Directory and directory service objects
• Client computers and devices
• Other Exchange organization elements
• Cloud elements

You can download the stencil, which is suited for Visio 2007 as well as Visio 2010, here; it has also been added to the toolkit page.