KB1914: "Invalid Credentials" error ... - Veeam Software
https://www.veeam.com/kb191407.08.2014 · Use Case Examples: If the Hyper-V server being added to Veeam Backup & Replication is joined to a domain (as recommended by Microsoft), a domain account that is a member of the local Administrators group on the Hyper-V server should be used to add the server to Veeam Backup & Replication.If the Hyper-V server being added to Veeam Backup & …