Syntax: WBADMIN GET VERSIONS -backupTarget:{ | } -machine: Description: Lists details about the available backups that are ...

Syntax: WBADMIN GET VERSIONS 
    [-backupTarget:{ | }]
    [-machine:]

Description:  Lists details about the available backups that are stored on 
the local computer or on another computer. When this command is used without 
parameters, it lists all backups of the local computer, even if those backups
are not available. The details provided for a backup include the backup time,
the backup storage location, the version identifier (needed for 
WBADMIN GET ITEMS and to perform recoveries), and the type of recoveries you 
can perform. To use this command, you must be a member of the Backup 
Operators group or Administrators group. 

Parameters:
-backupTarget  Specifies the storage location that contains the backups that 
                you want the details for. Use for listing information about 
                backups that were not of the local computer. Alternate 
                locations can be locally attached hard disk drives, DVD 
                drives, or remote shared folders.

-machine       Specifies the computer that you want backup details for. 
                Use when backups of multiple computers are stored in the 
                same location. Should be used when -backupTarget is specified.

Examples:
WBADMIN GET VERSIONS -backupTarget:h:
WBADMIN GET VERSIONS -backupTarget:\\servername\share -machine:server01

Remarks:  To list items available for recovery from a specific backup, use 
WBADMIN GET ITEMS.