Microsoft Office is a massive platform with a lot of moving parts, as such not just one security product covers everything. To ensure your 365 environment is safe we make sure to advise that you have the following enabled and properly configured;
MFA – Multi-Factor Authentication is turned on for all users
Antivirus for your 365 environment
Malware scanner to check for malicious and phishing emails
Security Scanning of your whole Office 365 account, monitored 24/7
Microsoft backup (using a 3rd party tool) of emails, files and Teams conversations
An IT company who can monitor the protection and remediate issues FAST