You
need to be assigned permissions before you can perform this procedure.
To see what permissions you need, see the "Mailbox database" entry in
the Mailbox Permissions topic.
- In the console tree, navigate to Organization Configuration > Mailbox.
- In the result pane, on the Database Management tab, select the database you want to configure.
- In the work pane, click Move Database Path.
- In the Move Database Path wizard, under Database paths, click Move to move the database path to the default location. You can change the location for the database file path by editing the Database file path field. You can change the location for the log folder path by editing the Log folder path text field.
- View
the status of the move operation. The wizard moves the database file
path and the log folder path to the new location. Click Back to make configuration changes.
- On the Completion page, confirm whether the move process completed successfully. A status of Completed indicates that the wizard completed the task successfully. A status of Failed indicates that the task wasn't completed. If the task fails, review the summary for an explanation, and then click Back to make any configuration changes.
- Click Finish to complete the Move Database Path wizard.
Reference
https://technet.microsoft.com/en-CA/library/dd351168(v=exchg.141).aspx