cbe5b0a1_Part_1____www_telnetport25_com__Permissions_required
[Scenario] Importing PSTs to mailboxes in your Exchange Online (Office 365) organization [Permissions required] 
You must be logged on with local administrator privileges on the computer where you run the PST Capture Console. The user account you specify on the Online Connection Settings tab of the PST Capture settings must be assigned the Organization Management role.
Installing & Using the Microsoft PST Capture Tool–Part 1… — www.telnetport25.com
Permissions required