EU companies must notify employees in advance if they plan to monitor work accounts. Ruling comes in a case filed by Romanian IT worker Bogdan Barbulescu, who was fired by his employer for using his work computer for private conversations with family members. The ECHR ruled that national authorities had not adequately protected his right to respect for his private life and correspondence. The Court also pointed out that firms should explain in clear to employees about how monitoring works, when this happens, and who views the collected data.
Source: https://www.bleepingcomputer.com/news/legal/companies-must-tell-employees-when-monitoring-their-pc-activity-eu-court-rules/