Based in Finland, Tieto is the largest computer services and software solution provider in the Nordic region of Northern Europe. Tieto relies on a Microsoft messaging solution to help employees at its 26 locations communicate with partners and customers. Most recently, Tieto upgraded to Microsoft Exchange Server 2013 to take advantage of enhancements in disaster recovery and storage. It also expects to reduce costs and improve productivity. Many mobile employees at Tieto use Exchange ActiveSync to access email and calendars on their mobile phones.