Use the following steps to enable archiving using Office 365.
Go to http://portal.office.com
Select administrator/beheerder. Go to the list of enabled users.
Select Exchange properties
Now the specified user has Archiving rights. So all data in the archive folder is not part of the 50 GB storage limitation. Let’s open Outlook Web Access and notice the Archive button:
When you select an email message you can easily archive that message. It will appear in the archive folder in your mailbox :
or when using Outlook:
Emailmessages are still enabled for indexing and search requests.