KB1174: RPC function call failed. The RPC server is ...
https://www.veeam.com/kb117423.08.2011 · Code: 1722 Cause The ports that Veeam Backup & Replication is attempting to use are blocked by a firewall. The VeeamVSSSupport service is stuck on the Guest OS Antivirus or Antimalware software may attempt to interact with the VeeamVSSSupport service executable. In rarer cases dynamic port allocation needs to be configured.
KB2912: Failed protection group rescan ... - Veeam Software
https://www.veeam.com/kb291202.04.2019 · Challenge After upgrading to Veeam Backup and Replication 9.5 Update 4, you may start receiving failed protection group rescan reports saying: No new hosts found. [Error] Failed to process 1 host processed Cause This behavior is related to the introduction of an option to automatically assign licenses to all incoming standalone agents. Solution