I have a new migration of SBS 2011 from 2003 that has been running for a couple of months now. The exchange log files have now about filled my c: drive (120gb). I've read the tech logs and they indicate that a VSS FULL BACKUP should flush our these log files, but that clearly is not happening. I have obviously checked that the backups are FULL VSS in the advanced settings.
Any ideas on what could be happening here and things I might try?