Yes, usn-policy and snapshot-policy are both “on”, and vss-exclude-writers is “{e8132975-6f93-4464-a53e-1050253ae220}”. Thanks for the direction; I’ll read about those. I have gotten our longest paths down to 242 characters now, but interestingly, this PathTooLong problem didn’t start happening until I updated Duplicati a few days ago.
FYI, I also created a Github ticket requesting that all PathTooLong exceptions in the logs should specify the path that caused the problem: PathTooLongException - Log should specify which file caused the error · Issue #3613 · duplicati/duplicati · GitHub