KB3099: Job fails to create VSS snapshot for SMB share
https://www.veeam.com/kb309911.02.2020 · The backup agent/application runs in a security context that has at least the READ permission on the file share data that is being backed up. Veeam Backup Proxy server should resolve both hostname and IP address of the server hosting the file share. For more information on the VSS for SMB File Shares feature, see the following Microsoft page ...