Installed cu6, after that OWA and ECP stopped to work, with a redirection loop, when I check my eventlogs I see thousands of this error message:
RpcHttp] An internal server error occurred. The unhandled exception was: System.MissingMethodException: Method not found: 'System.String Microsoft.Exchange.Security.Authentication.IIdentityExtensions.GetSafeName(System.Security.Principal.IIdentity)'.
at Microsoft.Exchange.HttpProxy.ProxyModule.<>c__DisplayClasse.<OnEndRequest>b__d()
at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)
Cant find a workaround, anyone else seen this error?