Create the Email Archiving App. After, you will associate mailboxes with the Email Archiving App.
Before You Begin
Configure the index server.
In the navigation pane, expand Protect > Exchange, and then click the Exchange Archiving or Exchange Journaling.
In the Exchange Archiving section, in the upper-right of the page, click Add App.
The Add App page appears.
Enter the required information.
The Email Archiving App that you created appears. You can perform configuration tasks at the Email Archiving App level on this page.