Forum Discussion
Migrating to Office 365
Thank you, VasilMichev --
This is a mailbox just for me and I maintain two separate email addresses. My mail servers are hosted at SiteGround and my PST file is about 5G (uncompressed and with nothing cleaned out of Deleted Items -- it would probably shrink down to about half that were I to prepare it for migration).
I have no experience with Exchange Online but am certainly willing to explore it. So I will be grateful for your continued advice.
OK, so for a single mailbox and such size, you should be fine with dumping all the content into the "main" mailbox, no need for Online archive. This has the added benefit that it immediately addresses the mobile problem (as Online archives are not accessible via the mobile apps). The rest is basically deciding which Office 365/Exchange Online plan is best suited for you, and performing the migration via Outlook's export/import functionality.
Even better, you can sign up for a free trial, experience the service for 30 days and decide whether it's a good fit for you. Keep the original mailbox up and running and use the PST export method to utilize the new one, and optionally configure some form of forwarding so that new mail ends up in the O365 mailbox as well (without having to redirect the MX record).
