62621: Acronis Cyber Backup 12.5: multiple 'Event 81' messages in Windows Event logs on Windows Server 2019 with Hyper-V

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Last update: 02-06-2021


You have Acronis Agent for Hyper-V installed on Windows Server 2019.

In Windows Event logs, you see multiple errors with Event ID 81:

Log Name:      System
Source:        Microsoft-Windows-FailoverClustering-Client
Date:          1/15/2019 1:58:34 AM
Event ID:      81
Task Category: None
Level:         Error
Keywords:      (1024)
User:          W2019HV-S200-1\Administrator
Computer:      W2019HV-S200-1
LogExtendedErrorInformation (978):
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
    <Provider Name="Microsoft-Windows-FailoverClustering-Client" Guid="{a82fda5d-745f-409c-b0fe-18ae0678a0e0}" />
    <TimeCreated SystemTime="2019-01-15T09:58:34.017688100Z" />
    <Correlation />
    <Execution ProcessID="4604" ThreadID="4580" />
    <Security UserID="S-1-5-21-985492664-1094537790-4148475425-500" />
    <Data Name="Parameter1">LogExtendedErrorInformation (978): </Data>


Acronis Cyber Backup 12.5 supports Windows Server 2019 for installation of Acronis Agent for Hyper-V since Update 4.


Update to the latest build. The issue is fixed since Update 4.