I don't know how many employees KPMG has but many of these chats were probably destined to be deleted anyway because big companies typically have short retentio

I don't know how many employees KPMG has but many of these chats were probably destined to be deleted anyway because big companies typically have short retention windows to limit litigation discovery. The main exception being material on litigation hold, which makes me cynically wonder what KPMG "accidentally lost".