This article will show you how to create a new mailbox database on Exchange Server 2013 using the new EAC manger.
To create a new mailbox database log on the Exchange EAC using the https://exchangeserver/ecp
Click on Servers -> Databases
Click on the plus sign
Fill in all the Database details and Click Save
To Edit the Database, Select the database and Click on the Edit button
Use the left menu button to edit the database settings