exchange server 2013 event id 1003 hatası

Merhaba Arkadaşlar

Sistemimizde 1 Adet DC Server 2012 Standart Uzerinde

      1 Adet Exchange Server 2013 CU3 Server 2012 Standart Uzerinde Kurulu. 

Son 1 aydır kullanıcılar yeni mail oluşturduklarında veya yanıtla yaptıklarında outlook kilitleniyordu.

Bugün ise Exchange İnformation Store Servisi ve Mailbox Replication Servisi Durmuştu.

Evenlara Baktıgımda ise  

System Eventlarında

Event ID 5011 WAS
A process serving application pool 'MSExchangePowerShellAppPool' suffered a fatal communication error with the Windows Process Activation Service. The process id was '12836'. The data field contains the error number.  

Aplication Evenlarında

Event ID 1003 MSExchange Front End HTTP Proxy (Her 1 Saniye icin hata vermiş)

[Oab] An internal server error occurred. The unhandled exception was: System.ArgumentNullException: Value cannot be null.

Parameter name: sourceObject

   at Microsoft.Exchange.HttpProxy.AnchorMailbox..ctor(AnchorSource anchorSource, Object sourceObject, IRequestContext requestContext)

   at Microsoft.Exchange.HttpProxy.UserADRawEntryAnchorMailbox..ctor(ADRawEntry adRawEntry, IRequestContext requestContext)

   at Microsoft.Exchange.HttpProxy.OabProxyRequestHandler.ResolveAnchorMailbox()

   at Microsoft.Exchange.HttpProxy.ProxyRequestHandler.InternalBeginCalculateTargetBackEnd(AnchorMailbox& anchorMailbox)

   at Microsoft.Exchange.HttpProxy.ProxyRequestHandler.<BeginCalculateTargetBackEnd>b__29()