Microsoft Office Online Server
Microsoft on-premises server product that runs Office Online. Previously known as Office Web Apps Server.
587 questions
Office Online Server processes on Windows Server 2022 crashes with .NET Runtime error
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Rafael
10
Reputation points
Hi,
I try to run an Office Online Server on a new Windows Server 2022.
I did the installation according to the instructions on https://learn.microsoft.com/en-US/officeonlineserver/deploy-office-online-server and the whole installation went without erros. I also installed the newest patch KB5002470, so it should run on a Server 2022.
The creation of the farm with PowerShell also worked without errors and I can access the discovery URL.
But the command Get-OfficeWebAppsMachine returns, that the machine is not part of a farm. And it is not possible to access any Office service on this server. They all return a Server Error.
In the Event Log all processes of the Office Online Server are crashing with the same .NET Runtime error (see below).
The exact same installation on a Windows Server 2016 is working fine.
What is the problem on the Windows Server 2022? Am I missing something?
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Collections.Generic.KeyNotFoundException
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].get_Item(System.__Canon)
at Microsoft.Office.Web.Apps.Environment.WacServer.WSServiceInstanceFinderAdapter..ctor()
Exception Info: System.Reflection.TargetInvocationException
at System.RuntimeTypeHandle.CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)
at System.RuntimeType.CreateInstanceSlow(Boolean, Boolean, Boolean, System.Threading.StackCrawlMark ByRef)
at System.Activator.CreateInstance(System.Type, Boolean)
at Microsoft.Office.ServiceInfrastructure.Runtime.EnvironmentAdapters.HostEnvironment.LoadAdapterInstance(Microsoft.Office.ServiceInfrastructure.Runtime.EnvironmentAdapters.AdapterLoadInformation, Boolean)
at Microsoft.Office.ServiceInfrastructure.Runtime.EnvironmentAdapters.AdapterLoadInformation`1+<>c__DisplayClass5_0[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<BuildInstance>b__0()
at System.Lazy`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].CreateValue()
at System.Lazy`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].LazyInitValue()
at Microsoft.Office.Web.Common.ServiceInstanceFinder.RefreshList(System.Object)
Exception Info: Microsoft.Office.Web.Common.OfficeServiceException
at Microsoft.Office.Web.Common.ServiceInstanceFinder.RefreshList(System.Object)
at Microsoft.Office.Web.Common.ServiceInstanceFinder..cctor()
Exception Info: System.TypeInitializationException
at Microsoft.Office.Web.Common.ServiceInstanceFinder.get_MachineCluster()
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost..ctor(Microsoft.Office.Web.Common.AppEnvironment, Boolean, Microsoft.Office.Web.Common.IServiceInstanceFinder, Boolean)
at Microsoft.Office.Excel.Server.ServiceHost.ServiceHost..ctor()
Exception Info: System.Reflection.TargetInvocationException
at System.RuntimeTypeHandle.CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)
at System.RuntimeType.CreateInstanceSlow(Boolean, Boolean, Boolean, System.Threading.StackCrawlMark ByRef)
at System.Activator.CreateInstance(System.Type, Boolean)
at System.RuntimeType.CreateInstanceImpl(System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[], System.Threading.StackCrawlMark ByRef)
at System.Activator.CreateInstance(System.Type, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[])
at System.Reflection.Assembly.CreateInstance(System.String, Boolean, System.Reflection.BindingFlags, System.Reflection.Binder, System.Object[], System.Globalization.CultureInfo, System.Object[])
at Microsoft.Office.Excel.Server.Host.ExcelServerHost.CreateHost(System.String, System.String)
at Microsoft.Office.Excel.Server.LazyStartupProperty`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Initialize()
at Microsoft.Office.Excel.Server.LazyStartupProperty`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].get_Value()
at Microsoft.Office.Excel.Server.ExcelServerSettings+<>c.<.cctor>b__556_0()
at System.Lazy`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].CreateValue()
at System.Lazy`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].LazyInitValue()
at Microsoft.Office.Excel.Server.ExcelServerSettings.get_MinTimeBetweenTwoEcsServiceRestartsFromWatchdogInMinutes()
at Microsoft.Office.Excel.Server.EcsWatchdog.EcsWatchdogApp.Main()
{count} vote
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Jiajing Hua-MFST 5,070 Reputation points Microsoft Vendor2023-12-19T07:20:49.0766667+00:00 Hi,
I suggest you go to ‘Turn Windows features on or off’ > Uncheck all the options under .NET Framework 4.8 > After the framework is uninstalled, restart the machine > Then check the options back > After the framework is installed, restart the computer again.
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Rafael 10 Reputation points
2023-12-19T16:14:20.67+00:00 Thank you for your reply.
I tried it, uninstalled Office Online Server and removed IIS and .NET Framework completely and then after restart installed everthing again while restarting the server after each installation. But I still have the same errors.
I will now get the machine re-installed with Windows Server 2019 and then try the whole process again next year.
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Rafael 10 Reputation points
2024-01-15T09:59:09.6666667+00:00 Now I have re-installed the Office Online Server on a fresh Windows Server 2019 machine and I am getting exactly the same .NET error in the Event Log. To me it seems, that the installation manual is wrong and that Office Online Server cannot be installed on any OS newer than Windows Server 2016.
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Ryams Swan 5 Reputation points2024-04-13T14:39:53.75+00:00 Same issue and tried with windows 2019, 2022 and no luck. Followed the steps as per the documentation. Anyone tried to install OOS on 2019 or 2022 recently??
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(169.60000000000002, 52%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Michel Mora 1 Reputation point2024-05-02T11:25:37.98+00:00 Hi Ryams And Rafael,
I'm facing the same issue. I've already installed OOS on Windows Server 2019, so that can't be the problem. Two things I haven't tested yet are meeting the hardware requirements since this is a test server with only 8 GB of RAM (minimum is 12 GB). On the other hand, I believe the installation program should indicate if this is an issue. Another thing I haven't tested is whether, if you run through an LB, the certificate should be installed there. Let's stay in touch to see how we can resolve this
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