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Configure a connector to send mail using Microsoft 365 or Office 365 SMTP relay following instrictions instructions in point 3: https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365
Send us the domain name that ends with *.mail.protection.outlook.com
Send us also a user and password for a user to be used for SMTP authentication
Alternatively set up the Email and Conferences > Settings > SMTP Server with the domain, username, password and port 25
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