This icon is a part of a collection of Microsoft SharePoint flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality.
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.
Related to Microsoft SharePoint Icon
Related icons are the icons with matching tags, as well as all logos icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors