This stencil and template provided enable you to create Visio drawings that contain Exchange Server 2007 objects. These shapes include icons for Exchange 2007 server roles, networking, telephony and Unified Messaging objects, Active Directory and directory service objects, client computers and devices, and other Exchange organization elements.
https://www.microsoft.com/downloads/details.aspx?FamilyID=45f7ea49-ceb2-4b04-8d46-2b0ae5e10694&DisplayLang=en
So when will they produce a ConfigMgr stencil?