Employees are putting their businesses at risk of cyber-attacks by refusing to obey the rules when it comes to the apps they use in the workplace, according to Maintel, the cloud and managed services specialist. Workers have confessed to using unapproved apps in the office, including Instagram, Facebook Messenger and Snapchat, to communicate with colleagues as well as friends and family. For example, four in ten employees (41 per cent) admit to using Instagram for more than two hours each day, despite the app being banned in almost half of UK organisations.  The majority of employees are well...