Veeam Backup for Microsoft 365 • OnedriveRestore Explorer not connection after 8.4 Update

Code:

[11.05.2026 12:12:26.755]          21 (1)       [Info] Connecting to Veeam Backup for Microsoft 365 server at 127.0.0.1:9194...[11.05.2026 12:17:27.303]          21 (1)       [Info]  Connection failed[11.05.2026 12:17:27.310]          21 (1)      [Error] Error: Timeout has expired: 300000 milliseconds.[11.05.2026 12:17:27.310]          21 (1)      [Error] Type: System.TimeoutException[11.05.2026 12:17:27.310]          21 (1)      [Error] Stack:[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.ThrowHelper.ThrowOperationTimeout(Int32 timeoutMilliseconds, Exception innerError)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.MethodCall.ExecuteCallInternalAsync()[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.MethodCall.ExecuteCallAsync()[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.LoggingInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.MetricsInterceptor.MeasureAsync[T](Func`1 fn)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.MetricsInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.TelemetryInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.InvokeAsync(InvokeArg invokeArg)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.<>c__DisplayClass8_0.<Invoke>b__0(Task _)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at System.Threading.Tasks.ContinuationResultTaskFromTask`1.InnerInvoke()[11.05.2026 12:17:27.310]          21 (1)      [Error]    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)[11.05.2026 12:17:27.310]          21 (1)      [Error] --- End of stack trace from previous location ---[11.05.2026 12:17:27.310]          21 (1)      [Error]    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)[11.05.2026 12:17:27.310]          21 (1)      [Error] --- End of stack trace from previous location ---[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.Invoke(InvokeArg invokeArg)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.InvokeProcessor.Invoke(InvokeArg invokeArg)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider._RemoteProxy.Invoke_ReturnVoid_WithParameters(InvokeArg invokeArg, String methodName, Object[] parameters)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at VCF.RuntimeAssembly.Proxy.4336b073-f5ff-4285-a124-930290391478.InitiateRpcSession(Guid)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.Rpc.RpcServiceReconnectHandler`1.BeforeGetChannel(TService channel)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Engine.Communication.PrimitiveServiceClient`1.GetChannel(Boolean canReconnect)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.SharePoint.Archiver.Remote.SharePointArchiverConnector.VerifyControllerVersion(IPrimitiveServiceClient`1 archiverClient, CancellationToken cancellationToken)[11.05.2026 12:17:27.310]          21 (1)      [Error]    at Veeam.Archiver.Integration.ArchiverConnector`2.CreateArchiverConnection(TE events, ICertificateValidator certificateValidator, IServiceConnectionConfig connectionConfig, Nullable`1 cancellationToken)[11.05.2026 12:17:27.312]          21 (1)       [Info] Disconnecting from Veeam Backup for Microsoft 365 server...[11.05.2026 12:17:27.322]          21 (1)      [Error] Error: Timeout has expired: 300000 milliseconds.[11.05.2026 12:17:27.322]          21 (1)      [Error] Type: System.TimeoutException[11.05.2026 12:17:27.322]          21 (1)      [Error] Stack:[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.ThrowHelper.ThrowOperationTimeout(Int32 timeoutMilliseconds, Exception innerError)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.MethodCall.ExecuteCallInternalAsync()[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.MethodCall.ExecuteCallAsync()[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.LoggingInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.MetricsInterceptor.MeasureAsync[T](Func`1 fn)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.MetricsInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.Vcf.Interceptors.TelemetryInterceptor.OnMethodCall(IMethodCall methodCall)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.InvokeAsync(InvokeArg invokeArg)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.<>c__DisplayClass8_0.<Invoke>b__0(Task _)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at System.Threading.Tasks.ContinuationResultTaskFromTask`1.InnerInvoke()[11.05.2026 12:17:27.322]          21 (1)      [Error]    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)[11.05.2026 12:17:27.322]          21 (1)      [Error] --- End of stack trace from previous location ---[11.05.2026 12:17:27.322]          21 (1)      [Error]    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)[11.05.2026 12:17:27.322]          21 (1)      [Error] --- End of stack trace from previous location ---[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.v4.Invoker.Invoke(InvokeArg invokeArg)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider.Invoke.InvokeProcessor.Invoke(InvokeArg invokeArg)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SPP.Communication.TypeProvider._RemoteProxy.Invoke_ReturnVoid_WithParameters(InvokeArg invokeArg, String methodName, Object[] parameters)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at VCF.RuntimeAssembly.Proxy.4336b073-f5ff-4285-a124-930290391478.InitiateRpcSession(Guid)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.Rpc.RpcServiceReconnectHandler`1.BeforeGetChannel(TService channel)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Engine.Communication.PrimitiveServiceClient`1.GetChannel(Boolean canReconnect)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SharePoint.Archiver.Remote.SharePointArchiverConnector.VerifyControllerVersion(IPrimitiveServiceClient`1 archiverClient, CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Archiver.Integration.ArchiverConnector`2.CreateArchiverConnection(TE events, ICertificateValidator certificateValidator, IServiceConnectionConfig connectionConfig, Nullable`1 cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SharePoint.Archiver.Remote.ArchiverSharePointClientCore.ConnectTo(IArchiverSharePointEvents events, IServiceConnectionConfig config, CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SharePoint.Archiver.Remote.ArchiverSharePointClient.ConnectTo(IArchiverSharePointEvents events, IServiceConnectionConfig config, CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.SharePoint.Explorer.Archiver.ServiceConnectionContext.Connect(IClientHandshakeEventPublisher clientHandshakeEventPublisher, CancellationToken token)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Presentation.Dialogs.ServiceConnectionDialog.ServiceConnectionViewModelFactory.<>c__DisplayClass0_0.<CreateViewModel>b__1(CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Presentation.Dialogs.ServiceConnectionDialog.Base.ServiceConnectionBaseViewModel.<CreateConnectionTask>b__46_0(CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Presentation.Tasks.AsyncConnectionTester.Run(CancellationToken cancellationToken)[11.05.2026 12:17:27.322]          21 (1)      [Error]    at Veeam.Core.AsyncTask2.Execute()