Peter Kalmstrom is the CEO and Systems Designer of the Swedish family business Kalmstrom Enterprises AB, well known for the software brand kalmstrom.com Business Solutions. Peter has 19 Microsoft certifications, among them several for SharePoint, and he is a certified Microsoft Trainer. Peter begun developing his kalmstrom.com products around the turn of the millennium, but for a period of five years, after he had created Skype for Outlook, he also worked as a Skype product manager. In 2010 he left Skype, and since then he has been concentrating on his own company and on lecturing on advanced IT courses. Peter has published three more books, SharePoint Online from Scratch, SharePoint Online Exercises and Excel 2016 from Scratch. All are sold worldwide via Amazon. As a preparation for lectures and books, Peter has created various video demonstrations, which are available on YouTube and at http: //www.kalmstrom.com/Tips. Peter divides his time between Sweden and Spain. He has three children, and apart from his keen interest in development and new technologies, he likes to sing and act. Peter is also a dedicated vegan and animal rights activist.