I am investigating the possibilities to migrate a very small company with 3 e-mailaccounts from Zimbra / Outlook 2010 to Office 365 Outlook with Exchange online.

What I find is that there are a few nice, but expensive tools to do such a migration. If *really* needed we will purchase one.

However I thought it would be possible to do it cheaper manually like so:
1. synchronize Zimbra emails in Outlook 2010


2. export Outlook 2010 to PST file
3. rename the Outlook 2010 storage folder
4. install Office 365 / Exchange online
5. create new Office 365 account in Office 365
6. import PST file from step 2
7. uninstall Office 2010

Am I missing something? Is this possible at all?

TIA,
Arie