Concentration on core business, focus on customers. With this credo of the Treuhandzentrum Zürich, it was clear from the outset that IT would be outsourced. Therefore, a reliable IT service provider was sought who could meet the high demands on the desired IT solution at reasonable prices. On the one hand, the ideal IT infrastructure should meet high-security requirements. After all, discretion and data protection are inviolable in the fiduciary and tax services business. This is all the more true as online services for customers are part of the core offering. But the IT solution should also be flexible, as employees are often on the move, work everywhere and want to have secure access to data at all times. And last but not least, service and support should be provided by an always available personal contact person, the single point of contact.