Veeam Backup O365

Costs approximately $50 USD for 3 years, paid annually and can backup 10 sites per user.

Steps:

Download Veeam Backup 30 day trial.

Choose Veeam Backup 365_4.0.0.1345.msi

Select all features

Add server as 127.0.0.1

Add organisation

Select services:
-Exchange Online
-SharePoint Online and One-drive for Business
-Make region default
-Basic Authentication
-User needs to be administrator of Site