Host-based backup of Microsoft Hyper-V VMs.
ve_leegregory
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Re: Guest Interaction Failing after Veeam 13 Upgrade

Post by ve_leegregory »

We are having the same issue.

We upgraded to 13 last Tuesday. We had a few issues after the upgrade but t ran fine for the rest of the week, This weekend some of the backups with Application Aware processing enabled are failing.

Support are leaning towards a Firewall issue so I have disabled the firewall on the backup servers, Proxy servers and the Guest server but it still fails. If we disable AAP the backup runs fine.

I have logged a support call with Veeam and will update if we find out what the issue is.
david.domask
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Re: Guest Interaction Failing after Veeam 13 Upgrade

Post by david.domask »

Hi Lee, welcome to the forums.

Can you please share your case number? It will help us to understand if there is an overarching issue.

As noted previously, not every issue has the same root cause, and while we have seen a slight uptick as seen in this topic on Guest Processing failures, not every case has the same root cause, so important to continue with Support.
David Domask | Product Management: Principal Analyst
kaffeine
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Re: Guest Interaction Failing after Veeam 13 Upgrade

Post by kaffeine » 1 person likes this post

Kev987 wrote: Dec 15, 2025 10:05 pm I was able to resolve my application aware processing errors after update to VBR 13 with Windows Hyper-V Standalone by doing the following:

Navigate to Inventory, Microsoft Hyper-V, Standalone Hosts, Hostname.
Right click the Host, hit properties, click next until "Review".
In my case the "Guest Interaction Proxy" was marked as "will be installed".
After hitting Apply, the Guest Interaction Proxy was installed and application aware processing was working just fine again.
Had the same issue - after upgrading to V13 - while creating backup jobs for new VMs (on W2022 Hosts) and this was the solution. Thank you!
jc711
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Re: Guest Interaction Failing after Veeam 13 Upgrade

Post by jc711 »

Not sure if its the same but saw this post pop up. We had an issue that was just resolved by a private fix provided by Veeam support which we had the following thread for guest processing failing when performing VIX based guest run time components:

applications-f66/aap-failing-on-most-vm ... 54e28b9c8a

Not sure if it is the same, but may be worth mentioning through your support ticket that hotfix 1210713 exists and they can validate if the hot fix applies to the issue being experienced.
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