11.19.How to assign database and storage to a mailbox?
It is also enabled to assign a database and storage to a single mailbox. Select a mailbox under the Exchange mailboxes, click on … and select Assign database and storage option from the list.
Fill out the Mailbox configuration window (Screenshot A). If you want to edit these settings in the future, a pop-up window will warn you that changing the database containing already archived items the user will not have access to these archived items (Screenshot B).
The information about the assigned database and storage will be allocated on the right side of the address book window, in the last columns: