Office 365 does offer users some archiving features, but to get anything more than very basic storage you need to either pay for a Premium add-on or go for one of the more expensive Enterprise plans.
Getting your head around what each of the Office 365 plans can offer you in the way of archiving can be a challenge in itself, but as a high-level overview, there are basically three camps…
- Entry level – Business or Business Premium – in-place hold (drag and drop)
- Premium – Exchange Online Archiving add-on or Enterprise plan
- Third party solution like MailStore Server