OpenCart Office 365 SMTP Settings

Mail EngineSMTP
SMTP Hostnametls://
SMTP UsernameMicrosoft 365 email address (example
SMTP PasswordMicrosoft 365 user password
SMTP Port587
SMTP Timeout5

Disable the Azure Security Defaults by toggling the “Enable Security Defaults” to “No”

Sign in to the Azure portal as a security administrator, Conditional Access administrator, or global administrator. Browse to Azure Active Directory > Properties. Select Manage security defaults. Set the Enable security defaults toggle to No. Select Save.

Enable SMTP Authentication

Go to Microsoft 365 Admin Center > Active Users

Disable Multi-Factor Authentication (MFA) 

In the Microsoft 365 Admin Center, in the left navigation menu choose Users > Active users. On the Active Users page, choose Multi-factor authentication. On the multi-factor authentication page, select the user, and disable the Multi-Factor auth status.