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A server processed by a job fails with the following error:
Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: [<hostname>]. Account: [...]. Win32 error:The network path was not found. Code: 53 Cannot connect to the host's administrative share. Host: [<ip>]. Account: [...]. Win32 error:The network path was not found. Code: 53
Note: This applies to both VMware and Hyper-V environments.
The key to troubleshooting this issue is identifying what environmental issue is preventing the Guest Interaction Proxy from connecting to the $admin share of the server being processed.
Tip: To test connectivity to the $admin share rapidly without having to run the job, use the "Test Now" button on the Guest Processing tab of the job to launch the Guest Credentials Test.
Test-NetConnection -computername <hostname\ip> -port 445
Note: When working with vSphere environments it is possible for Veeam Backup & Replication to use a network-less connection method (VIX) if direct communication fails. This method uses VMware tools to push the runtime components into the machine and manage them. If the VM being protected is in a DMZ or other network isolated configuration it may not be possible to get RPC working and require that connectivity via VIX be investigated. Reference: https://www.veeam.com/kb1788.
If Veeam Backup & Replication will be operating in a vSphere environment where the Veeam server and its components will never have direct network connectivity to the Guest OS of the Virtual Machines, it is possible to force VIX to be attempted first.
Create the following registry value on the Veeam Backup & Replication server:
Key Location: HKLM\SOFTWARE\Veeam\Veeam Backup and Replication\
Value Name: InverseVssProtocolOrder
Value Type: DWORD (32-Bit) Value
Value Data: 1
To disable (default behavior), set the value to 0 (false)
For Veeam Backup & Replication 9.x and later the value should also be created on the Guest Interaction Proxy
(note that the path is different)
Key Location: HKLM\SOFTWARE\Wow6432Node\Veeam\Veeam Backup and Replication\
Value Name: InverseVssProtocolOrder
Value Type: DWORD (32-Bit) Value
Value Data: 1
To disable (default behavior), set the value to 0 (false)
Veeam Service restrart is not required.
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