wbadmin.exe start backup -allcritical -quiet -backuptarget:\\server_name\bmrshare
I have to say for a purely Microsoft-based backup solution, backing up a purely Microsoft server, it is ridiculous that it can't calculate the BMR automatically and effectively. If an end-user can do it manually using a Microsoft tool, then a mature, premium Microsoft backup product should be able to. So if I have 100 servers to back up with BMR, Microsoft expects me to run 100 trial manual backups just to figure this out?????!