JLONLINE

Hey, I'm new to SCCM and I'm learning as I go. I'm currently trying to setup multicast for OS deployment. I have no issues with unicast. I work in a school environment and would need to image hundreds of machines and unicast does not cut it. I'm having issues with multicasting with SCCM. I'm getting error message with, Failed to open session request (Code 0x80004005). Any help would be highly appreciated! Thanks.