Essential part of every good CRM deployment is a nice and concise navigation. That includes customized sitemap and command bars. When new element is added to either of those, user experienced can be greatly enhanced with a good icon.
We already referred to the good external sources of the icons but one of the best sources has always been there, right under our noses. If you downloaded and extracted Dynamics CRM SDK, you’ll find hundreds of icons and images in the folder [CRM SDK]\Resources\Images. Most of these icons and images are already in use in Dynamics CRM but when the concepts are similar, e.g. Clone vs Copy, there is no reason not to grab one of the existing icons.