I need some assistance understanding rentention policies in Veeam for Office 365. We've just set up Exchange Hybrid and are about to begin migrating mailboxes.
Our current VBR backup for Exchange On-Premises retains 45 restore points, which with our full/inc strategy gives us around 7 weeks on disk. If a user deleted an email, and then wanted us to restore it 8 weeks later, in theory that email is not in any backups and is lost, simplifying a lot of things here.
Trying to translate this into Veeam O365. The retention options are a lot different. So my understanding is, if I set the retention policy on a repositry to 45 days, Veeam O365 will only backup and download emails that are 45 days or younger? And Once an email in the repository gets older than 45 days, it will also delete it from the backup? Is that correct?
And likewise, if I set the retention to keep everything, literally every email, in everyone's mailbox will be backed up and kept forever. And if the user deletes that email, it still won't be deleted from the backup repository?
If my understanding above is correct, is there a way that I can translate my on-premise retention period into something similar within VO365?
Any help getting my head around this would be much appreciated!