Veeam Backup: RPC error The RPC server is unavailable. Code 1722

In one of my Veeam Backup jobs I had two Windows 2008 R2 VM’s with the Windows Firewall enabled. The backup job failed with the error: RPC error The RPC server is unavailable. Code 1722.

You can find the error in the job Statistics screen:


This error is the result of enabling Application-aware image processing (Microsoft VSS) and the Windows Firewall. RPC by default doesn’t like to work through a firewall. But Microsoft has a fix for this. KB article KB154596 explains how to change the RPC settings within the Windows Registry. You need to add the following settings:


Specifies a set of IP port ranges consisting of either all the ports available from the Internet or all the ports not available from the Internet. Each string represents a single port or an inclusive set of ports. For example, a single port may be represented by 5984, and a set of ports may be represented by 5000-5100. If any entries are outside the range of 0 to 65535, or if any string cannot be interpreted, the RPC runtime treats the entire configuration as invalid.

PortsInternetAvailable REG_SZ Y or N (not case-sensitive)

If Y, the ports listed in the Ports key are all the Internet-available ports on that computer. If N, the ports listed in the Ports key are all those ports that are not Internet-available.

UseInternetPorts REG_SZ ) Y or N (not case-sensitive

Specifies the system default policy.

If Y, the processes using the default will be assigned ports from the set of Internet-available ports, as defined previously.

If N, the processes using the default will be assigned ports from the set of intranet-only ports.

Or you can copy the following *.REG file and execute this on the Windows 2008 R2 VM.

Windows Registry Editor Version 5.00


The next step is to add a firewall rule:


After changing these settings you need to reboot the VM.

Now you are able to run the Veeam Backup job with the Firewall enabled on a Windows 2008 R2 VM.


Source Link KB154596

Veeam Powershell Toolkit: Changing the Processing Mode

Before I start with the actual post I want to start with a little tip. Before you can run Veeam Powershell Toolkit scripts, you need to add the VeeamPSSnapin. You can do this via the following code:

if((Get-PSSnapin -Name VeeamPSSnapIn -ErrorAction SilentlyContinue) -eq $null){
    Add-PSSnapin "VeeamPSSnapIn" 

So now you’re able to load the snapin, you can run your Veeam Powershell Toolkit scripts. In this post I want to show how to change the Processing Mode. You probably know the three modes:


You can find the Processing Mode options via the following Powershell script:

$vbrjobname = "Production"
$vbrjob = Get-VBRJob | Where {$_.Name -eq $vbrjobname}

So now you know which modes there are, but how do you change this option with Powershell? Well you can do this with the next script:

if((Get-PSSnapin -Name VeeamPSSnapIn -ErrorAction SilentlyContinue) -eq $null){
    Add-PSSnapin "VeeamPSSnapIn" 

$vbrjobname = "Production"
$vbrjob = Get-VBRJob | Where {$_.Name -eq $vbrjobname}
$DirectSAN = "san;nbd"
$VirtualAppliance = "hotadd;nbd"
$Network = "nbd"

$mode = $VirtualAppliance

if($ -ne $mode){
    $vddk = $vbrjob.GetOptions()
    $vddk.VDDKMode = $mode
    Write-Host "VDDK mode changed to $mode" -ForegroundColor Green
    Write-Host "Nothing to change" -ForegroundColor Yellow

Just save the script and change the $mode parameter to the option you want to use. The script will give you the following output:


Working with the Veeam Powershell toolkit

After the short introduction of the Veeam Powershell toolkit in my earlier post, It was about time to play with the Toolkit. In this post I will show you how to create a Backup Job and how to add VM’s to the backup job.

Lets start to add a new Veeam and Replication backup job called “Production” and add the following VM’s: DC01, VC01 and MC01:

$vbrserver = Get-VBRServer | Where {$_.Type -eq "Local"}
$vbrjobname = "Production"
$vbrfolder = "C:\veeam\production\"
$vbrfile = "production.vbk"
$vbrobjects = "DC01","VC01","MC01"

Add-VBRBackupJob -Name $vbrjobname -Type VDDK -Server $vbrserver `
-Folder $vbrfolder -FileName $vbrfile -Objects $vbrobjects

The backup job is created and the following output will be generated on the console:


You can verify the Job settings and the selected VM’s inside the GUI:


If you want to add an extra VM to the backup job. You can run the following code to add a VM called NAGIOS:

$vbrjobname = "Production"
$vbrjob = Get-VBRJob | Where {$_.Name -eq $vbrjobname}
$vbrserver = Get-VBRServer | Where {$_.Type -eq "VC"}
$vbrobjects = "NAGIOS"

Add-VBRJobObject -Job $vbrjob -Server $vbrserver -Object $vbrobjects

Annotation: the $vbrserver parameter is different than the first script in this post. When you want to add an Object to an existing job, you need to use the vCenter server as the backup source instead of the Veeam Backup server because you need to add an object from vCenter server to the backup job. See help for more info:

get-help Add-VBRJobObject -Detailed

The output from the command:




    Add VMs or VM containers to the existing job.


    Add-VBRJobObject [-Job] <CBackupJob> [-Server] <CHost> [-Objects] <String[]

    > [-WarningAction <ActionPreference>] [-WarningVariable <String>] [<CommonP


    Add-VBRJobObject [-Job] <CBackupJob> [-Server] <CHost> [-Entities] <CEntity

    []> [-WarningAction <ActionPreference>] [-WarningVariable <String>] [<Commo



    Add VMs or VM containers to the existing backup, replication or copy job.


    -Job <CBackupJob>

        Provide an object of the existing backup, replication or copy job.

    -Server <CHost>

        Provide an object of the ESX/ESXi server on which VMs or VM containers


    -Objects <String[]>

        Provide objects of VMs or containers of VMs that you want to back up, r

        eplicate or copy.

When the command completed successfully you will see the following output:


To be continued…