🌐EnglishEnglishEspañolNederlandsالعربية中文日本語EntityQ105820537· pop 7· linked from 146 articles2021 Microsoft Exchange Server data breachseries of cyberattacks exploiting Microsoft's email and calendar server softwareConnectionsUnited StatesCountryMicrosoftEntityCategories2020s in hacking2021 data breaches2021 in computingComputer security exploitsCyberattacksInternet securityMicrosoft softwareSoftware bugs