KB1788: Credentials Test or Job Fails ... - Veeam Software
https://www.veeam.com/kb178808.07.2013 · Veeam Backup & Replication uses the VIX API as a network-less connection method to perform Guest Processing when a VM cannot be contacted directly via RPC. Due to the way VIX operates, it is blocked by Windows User Account Controls. Also, because VIX relies on VMware Tools, if VMware Tools is out of date, issues may occur. Solution
Troubleshooting Guest Processing "Test ... - Veeam Software
https://www.veeam.com/kb322523.07.2020 · In VMware environments, Veeam Backup & Replication can use two methods to connect to a guest: RPC or VIX. If RPC is testing successfully, it is generally acceptable for the VIX test to fail as it will not likely be used. However, if it is desired to have VIX succeed, please see the relevant section at the bottom of the solutions section. Solution
RPC function call failed. The RPC server is ... - Veeam Software
www.veeam.com › kb1174Aug 23, 2011 · Veeam Backup & Replication however is not able to add firewall exclusions to hardware or third-party software firewalls. The most common ports that cause this issue when using Application-Aware Image Processing are the Dynamic RPC ports that the temporary guest agents are assigned. These ports are: 1025 to 5000 (for Microsoft Windows 2003)
KB1174: RPC function call failed. The RPC server is ...
https://www.veeam.com/kb117423.08.2011 · Veeam Backup & Replication however is not able to add firewall exclusions to hardware or third-party software firewalls. The most common ports that cause this issue when using Application-Aware Image Processing are the Dynamic RPC ports that the temporary guest agents are assigned. These ports are: 1025 to 5000 (for Microsoft Windows 2003)