In order to configure On-premise Journaling, you must complete the following steps:
1. To set up on-premise journaling, go to https://login.microsoftonline.com/
2. Log in to your administrative account.
3. Select Admin/Exchange from the menu in the upper right.
4. Select Compliance Management.
5. Select Journal Rules.
6. If there is an existing rule, delete it.
7. Add a journal rule and specify the email address of the journal mailbox.
NOTE: When sending mail to or from one of the users in the Office 365 tenant, an envelope journal report will be sent to the email address specified in the journal rule.
The messages will arrive from Office 365 in a local Exchange mailbox, which the MAPI Dataloader will empty, and the File System Databloader will load into the database. These messages can be searched by the Archive Manager administrator.