Exchange Cannot Be Autodiscovered From Sharepoint?
Jan 25, 2011
I've created an ascx control for use in Sharepoint that accesses Exchange 2010 via it's web services. When run in it's own ASP.NET test site (wrapped in a simple aspx page) all works fine. As soon as the control is used within Sharepoint a "The Autodiscover service couldn't be located" error is encountered.
The code behind dll for the ascx control has been dropped in to the GAC and also Microsoft.Exchange.WebServices.dll
Microsoft.Exchange.WebServices.dll has also been added to the safe control list in web.config for the sharepoint site:
<SafeControl Assembly="Microsoft.Exchange.WebServices, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="Microsoft.Exchange.WebServices" TypeName="*" Safe="True" />
I can ping the autodiscovery service and access the Exchange web service url https://mydomain.com/EWS/Services.wsdl from the Sharepoint server.
A username and password is being sent to the service in the ascx's code behind:
Dim service As ExchangeService = New ExchangeService()
service.Credentials = New WebCredentials(usrExchange, pwdExchange)
service.ImpersonatedUserId = New ImpersonatedUserId(ConnectingIdType.SmtpAddress, email)
Interestingly, if I specify the url [URL] to the service I get a 405 Method not allowed error.
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