hello,

i'm trying to do a hybrid configuration for exchange 2013 but i get this erreur

ERROR : chec d'excution de la sous-tche CheckPrereqs : Vrification des conditions pralables pour les locataires
                                Impossible de charger le type 'Microsoft.Exchange.Data.Directory.DirectoryBackendType' partir de l'assembly 'Microsoft.Exchange.Data.Directory, Version=15.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
                                   System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)
                                   System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)
                                   System.UnitySerializationHolder.GetRealObject(StreamingContext context)
                                   System.Runtime.Serialization.ObjectManager.ResolveObjectReference(ObjectHolder holder)
                                   System.Runtime.Serialization.ObjectManager.DoFixups()
                                   System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
                                   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
                                   System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, IMethodCallMessage methodCallMessage)
                                   Microsoft.Exchange.Data.SerializationTypeConverter.DeserializeObject(Object sourceValue, Type destinationType)
                                   Microsoft.Exchange.Configuration.MonadDataProvider.MonadCommand.Deserialize(PSObject psObject)
                                   Microsoft.Exchange.Management.Hybrid.RemotePowershellSession.RunOneCommand[T](String command, SessionParameters parameters, Boolean ignoreNotFoundErrors)
                                   Microsoft.Exchange.Management.Hybrid.RemotePowershellSession.RunOneCommandSingleResult[T](String command, SessionParameters parameters, Boolean ignoreNotFoundErrors)
                                   Microsoft.Exchange.Management.Hybrid.PowerShellCommonSession.GetOrganizationConfig()
                                   Microsoft.Exchange.Management.Hybrid.TenantDetectionTask.CheckPrereqs(ITaskContext taskContext)
                                   Microsoft.Exchange.Management.Hybrid.Engine.ExecuteSubStep(String subStepName, ITaskContext taskContext, ITask task, Func`3 substep, Func`4 createException, Boolean throwOnFalse)

Consider posting to a French language forum.