This is the MS SharePoint icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
It is a bold letter S in side a square slanted so that far left side appears to be further back than the near right side. There are two circles evenly spaced attached to the near right side and from then a simi circle is drawn to a 3rd circle of the same size as a point.