Move Mail with PST Files

Outlook 2007 and Outlook 2010 have the ability to host multiple inboxes at the same time. If you simply add your Office 365 inbox to Outlook and you already have an inbox, you now have two mailboxes. When you set up your account this way, you can easily access your old mail and use Office 365 at the same time.

With two mailboxes, your previous mail is available to you in Outlook but not in Office 365. To add your old mail to your Office 365 inbox, just drag your previous mail into your Office 365 inbox. It really is that simple. You can do the same with contacts, your calendar, tasks, and other items associated with an Outlook inbox. This is perhaps the most commonly used method for migrating small businesses to Office 365 because it is easy to do and works well.