O365 BU

Backup to where, and for what purpose? Backup and restore in O365 is Microsoft's responsibility, generally speaking you should have zero need for such. There are few vendors that do offer backups to an external system, but they rarely can backup data across all services, let alone restore it if needed. Whatever the case, dont backup to an PST file, those are insecure and unreliable.

Veeam, Altaro and other companies all say that Microsoft does NOT backup Outlook Data and are not to be trusted. Are they being less than truthful?

If not backing up to a .pst, what, then? Back to my original question...

Thanks for your answer! I suspected as much, but just needed to hear it from an expert.