Can I upload, copy or move files into Koofr Vault through WebDAV?

No. Koofr Vault is a client-side encrypted service. Your files need to be encrypted on your computer before the upload, this cannot be done on the server. Therefore, you cannot upload, copy, or move unencrypted files or folders into Koofr Vault via WebDAV, as they do not get encrypted in the process. This is only possible through Koofr Vault.