This is a Microsoft SharePoint icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,300 icons, all in the same style and 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