then they are probably not backing up the logs.
even if they are using backup exec to back the databases up to tape I would still have backups on disk, space permiting, and ALWAYS disk backups for system dbs, preferably on a different drive to the system database files.
Set up maintenance plans to backup your databases, including transaction log backups for those databases in full recovery mode.
If msdb is in full mode, put it back in simple mode.
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