We use Office 365. One of our users has a large mailbox (>20 GB), but a small SSD drive, and he's running out of space. I'd like to archive anything older than 2 years from his mailbox, using the online archiving that's available in his Office 365 plan (E3). He would need to be able to easily access the older mails, but it would be fine if they're not on his local machine.
The problem is, I don't know where to start with this. In Outlook, I can see the option to archive anything older than X, but I'm not sure what will happen to his older mails if I do. Where on the server side do they go? If he does a search in Outlook, will it also check the older mails? What's the difference between just limiting the size of a local PST and archiving? It's not very clear to me, and using the online archive in 365/Exchange Online is not widely documented online, as far as I could see. There doesn't seem to be a lot of explanation about it.
To recap, I'd like to know:
- what will happen to mails on the server that are older than the threshold that I would set in Outlook?
- will they appear in search results?
- how can they be accessed again?
Many thanks for your help!