/System/Library/PrivateFrameworks/SharePointManagement.framework/XPCServices/SharePointManagementService.xpc/Contents/MacOS/SharePointManagementService Share Points are directories which are shared with other machines over the network. They are managed by the user in System Preferences > Sharing > File Sharing. SharePointManagementService is the service component that is responsible for the creation and removal of Share Points entries.
The binary is a part of SharePointManagement private framework.