Online archive mailboxes in Office 365 are essentially unlimited and free – but that doesn’t mean there isn’t a place for third-party archiving, even though it comes at a cost.
Why would you need third-party archiving?Office 365 archiving is essentially unlimited & free – so why would you need third-party archiving?Click To Tweet
First of all, just getting all that legacy mail up to the cloud can be a challenge. And then, using built-in archiving has limitations: preservation is generally on a per-mailbox basis and essentially “mixes” preserved emails with operational email data. It can be confusing when it’s time to retrieve archived information, something that third parties do very well versus what’s built into Office 365.