AA20-120A: Microsoft Office 365 Security Recommendations By CISA Original release date: April 29, 2020 Summary As organizations adapt or change their enterprise collaboration capabilities to meet “telework” requirements, many organizations are migrating to Microsoft Office 365 (O365) and other cloud collaboration services. Due to the speed of these deployments, organizations may not be fully considering the security configurations of these platforms. This Alert is an update to the Cybersecurity and Infrastructure Security Agency's May 2019 Analysis Report, AR19-133A: Microsoft Office 365 Security Observations , and reiterates the recommendations related to O365 for organizations to review and ensure their newly adopted environment is configured to protect, detect, and respond against would be attackers of O365. Technical Details Since October 2018, the Cybersecurity and Infrastructure Security Agency (CISA) has conducted several engagements with customers who have migrated t...