For install image transmissions: - WDSUTIL Options /Remove-MulticastTransmission /Image: /Server: /ImageType:Install /ImageGroup: ...

For install image transmissions:
--------------------------------
WDSUTIL [Options]
        /Remove-MulticastTransmission
        /Image:
        [/Server:]
        /ImageType:Install
        [/ImageGroup:]
        [/Filename:]

[/ImageGroup:]
        The image group containing the image associated with the
        transmission.  If not specified and only one group exists on
        the server, then that image group will be used.  If more than
        one image group exists then the image you must specify this
        option.

[/Filename:]
        If the source image cannot be uniquely identified by name, you
        must specify the file name.

EXAMPLES:
---------
To remove a transmission but allow all current transfers to complete:
WDSUTIL /Remove-MulticastTransmission /Image:"Vista with Office"
/ImageType:Install

WDSUTIL /Remove-MulticastTransmission /Image:"x64 Boot Image"
/ImageType:Boot /Architecture:x64


To remove the transmission and stop all current transfers:
WDSUTIL /Remove-MulticastTransmission /Server:MyWDSServer
/Image:"Vista with Office" /ImageType:Install /ImageGroup:ImageGroup1
/Filename:install.wim /Force