so i'm having the damnest time trying to get the federation working between 2 exchange 2010 sp1 systems. We got it working one way, but now when I run a test-outlookwebservices - targetaddress xxx@b.com (b being the other domain i'm federated with...i'm runnign this from a ) i get this error RunspaceId : c525e8c1-8c08-4d11-b326-7ebb1d1101a1 Id : 1011 Type : Error Message : When querying Availability for jmiller@enpointe.com received ErrorAutoDiscoverFailed:Autodiscover failed for e-mail address<>SMTP:jmiller@enpointe.com with exception System.Web.Services.Protocols.SoapHeaderExcep tion: An error occurred when verifying security for the message. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResp onse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.EndInvoke(IAsyncResult asyncResult) at Microsoft.Exchange.SoapWebClient.AutoDiscover.DefaultBinding_Autodiscover.EndGetUserSettings(IAsyncR esult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.UserSoapAutoDiscoverRequest.EndGetSettings(IAsyncR esult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.SoapAutoDiscoverRequest.<>c__DisplayClass4.<EndInv oke>b__3() at Microsoft.Exchange.InfoWorker.Common.Availability.SoapAutoDiscoverRequest.ExecuteAndHandleException( ExecuteAndHandleExceptionDelegate operation)., inner exception: An error occurred when verifying security for the message. Can some one PLEASE help me out with this? We've setup federation following all the directions.

Can you run Test-FederationTrust successfully from both orgs? Wes

I have the same error. Test-FederationTrust successfully from both orgs. Interesting that free\busy info is available from A company to B company, but when we try to get free\busy from B to A - we're getting this error. Any ideas to resolve this?