I am trying to get multicast to work on a DP. But when I kick off an OSD and get to one of the items that I have enabled multicasting (lets say the OS image) then I get the following in the smsts.log:
Failed to get MCS key (Code 0x80004005)
ClientRequestToMCS::DoRequest failed. error = (0x80004005)
Request to MCS 'MYSCCMSERVER.SCCM.LOCAL' failed with error (Code 0x80004005)
Multicast OpenSessionRequest failed (0x80004005)
Sending status message: SMS_OSDeployment_PackageDownloadMulticastStatusFail
And then it reverts to a normal HTTP download. Why is this failing?