Cross AD Site Free Busy / Availability Issue

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Hi all,

I'm having issues with free busy info across a couple of sites, we currently have 3 exchange servers, 2 in site 1 and 1 in site 2.

Its fine within site, but across site it doesn't seem to work, if I run Test-OutlookWebServices -Identity -TargetAddress I get the following error:

RunspaceId : 0bd689f9-7036-4c95-8369-f7a20a92fe8c

Id : 1011

Type : Error

Message : When querying Availability for received ErrorProxyRequestProcessingFailed:Syste
m.Web.Services.Protocols.SoapException: The authenticated user doesn't have sufficient privileges to issue
this request.
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.InfoWorker.Common.Availability.Proxy.Service.EndGetUserAvailability(IAsyncResult
at Microsoft.Exchange.InfoWorker.Common.Availability.FreeBusyApplication.EndProxyWebRequest(ProxyWebReq
uest proxyWebRequest, QueryList queryList, Service service, IAsyncResult asyncResult)
at Microsoft.Exchange.InfoWorker.Common.Availability.ProxyWebRequest.EndInvoke(IAsyncResult asyncResult
at Microsoft.Exchange.InfoWorker.Common.Availability.AsyncWebRequest.EndInvokeWithErrorHandling(). The
request information is ProxyWebRequest type = CrossSite, url =
Mailbox list = <Site2 User>, Parameters: windowStart = 12/13/2010 1:00:00 A
M, windowEnd = 12/13/2010 2:00:00 AM, MergedFBInterval = 30, RequestedView = FreeBusy
., inner exception: The authenticated user doesn't have sufficient privileges to issue this request.

I'm assuming this is because its on a different subnet? I can't get to the EWS on site2 without it prompting me to login so thats likely the issue, how to fix is another story :)



Cheers man, but it is prompting for credentials and if I do login it gives me the xml etc :)


Aha, fixed it!

Get-ClientAccessServer | Add-ADPermission -AccessRights ExtendedRight -ExtendedRights " ms-Exch-EPI-Token-Serialization" -User " OURDOMAIN.COM\Exchange Servers"

Once it replicated to the other site it worked, yay!
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