'Autodiscover service couldn't be located' when trying to access Exchange 2010 account with EWS MANAGED API

Question

I am using Auto discover service Url for a specified e-mail address.

ExchangeService Service = new ExchangeService(ExchangeVersion.Exchange2010);
Service.Cr         


        

Answer 1

I have hit this and a trace shows that after using the proxy to access 365 it starts a DNS lookup for an SVC record. This lookup goes to internal DNS and not the proxy, our internal DNS does not resolve external DNS entries, that is why we have proxy servers. Not yet found out why it is doing a DNS lookup rather than using the proxy servers, but that is what is causing our version of this problem