Sometimes you need a good set of icons to help create a design. I recently discovered just such a set and it's been a pleasant surprise in multiple ways. Not only are the images in this download available in Visio format, but SVG, PNG, and PowerPoint formats are also included. This seems to fit the new Microsoft since these formats should cover nearly everyone regardless of platform.
What I like most about this set, though are the icons for the stuff typically only seen in MS documentation. I was looking for the same Traffic Manager graphic used by MS and it's there along with almost everything else related to Azure services.
Microsoft Azure, Cloud and Enterprise Symbol / Icon Set - Visio stencil, PowerPoint, PNG, SVG (https://www.microsoft.com/en-us/download/details.aspx?id=41937)