Azure hosted VMs: VEEAM Backup Ports and MFA

Office 365 App ID, App secret and App Password Setup Guide for VEEAM Backup integration

Communication port requirement:

https://helpcenter.veeam.com/docs/vbo365/guide/vbo_used_ports.html?ver=40

..Read this blog post to learn how to start with multi-factor authentication enabled accounts in Veeam Backup for Microsoft Office 365.

MFA setup

https://www.veeam.com/blog/setup-multi-factor-authentication-office-365.html

https://www.veeam.com/veeam_modern_authentication_office_365_wpp.pdf

https://www.veeam.com/wp-modern-authentication-microsoft-office-v3.html

Verifying office365 account: https://portal.office.com/account