Microsoft 365 Email Security Management Guide
Block Unwanted Emails Objective: Prevent sending or receiving emails from specific external email addresses or domains. Action: Navigate to the Tenant Allow/Block List in the Microsoft Security Center. Configure the settings to block specific email addresses or domains. For direct access, use this link: Tenant Allow/Block List. Review Past Week of Sign-In History Objective: Review sign-in history to identify any unusual user activity. Action: Access the Azure portal’s sign-in history section. Specify the user of interest and examine their sign-in locations and activities. Access the portal here: Azure Sign-In History.
