vRanger was not designed to access the Exchange database and from it extract a single mailbox.
vRanger has the File Level Restore (FLR) option which allow you the extraction of any single file, in this case such single file would be the Exchange database itself and a mailbox would correspond to a registry inside it. vRanger can not reach such level of granularity.
There is no option, on vRanger, to restore a single mailbox from a backup of an Exchange Server.
Simplest recommendation would be recovering the whole Exchange server and from it following the normal procedure of mailbox extraction.
Other possible recommendation would be using Recovery Manager for Exchange (RME) which is another product from Dell Software family.
