public static string DiscoverExternalEwsUrl(ExchangePrincipal mailbox)
{
if (EwsHelper.discoveryEwsExternalUrl == null)
{
EwsHelper.discoveryEwsExternalUrl = (Func <IExchangePrincipal, Uri>)Delegate.CreateDelegate(typeof(Func <IExchangePrincipal, Uri>), Type.GetType("Microsoft.Exchange.Data.ApplicationLogic.Cafe.FrontEndLocator, Microsoft.Exchange.Data.ApplicationLogic").GetMethod("GetFrontEndWebServicesUrl", BindingFlags.Static | BindingFlags.Public, null, new Type[]
{
typeof(IExchangePrincipal)
}, null));
}
Uri uri = EwsHelper.discoveryEwsExternalUrl(mailbox);
if (!(uri == null))
{
return(uri.ToString());
}
return(null);
}
