For the benefit of all, actually looking into the ESET KB I see that you can specify a quarantine folder in the command line scanner tool...
Thanks Marcos. But this loss of configuration functionality in newer releases sucks. It is not clear to me why it was removed. ~ Jan
From what I see, it seems all quarantined files are stored in each user’s “documents” and in the folder \Local settings\Application data\ESET\ESET...
Separate names with a comma.