However, based on standard Microsoft software versioning and patch naming conventions, is not a recognized official update name. It most likely refers to a hypothetical or typo-ridden version of a patch for Microsoft Office 2013 (since “Mso15” indicates Microsoft Office 15, which is Office 2013).
For organizations still running Windows 7 with Office 2013 (unsupported OS), not applying this patch is a critical risk. Mso15.11.2patch
Microsoft Office for Mac (2016 / 365) Patch Version: 15.11.2 Release Date: (example) April 12, 2016 Previous Version: 15.11.1 However, based on standard Microsoft software versioning and