I'm encountering this error when trying to connect to Exchange from k2 blackpearl, the same settings work fine on a Server 2008 machine however I am trying to upgrade our system to Server 2012 R2 and am now getting this message in the event log:
61012 Exception from message source firstname.lastname@example.org: System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.
at System.Web.Services.Protocols.WebClientProtocol.EndSend(IAsyncResult asyncResult, Object& internalAsyncState, Stream& responseStream)
at System.Web.Services.Protocols.SoapHttpClientProtocol.InvokeAsyncCallback(IAsyncResult result)
I have checked the proxy using both netsh and inetcpl and both are set to direct access, the email integration settings are:
From address: email@example.com
Administrative exchange: mydomain\workflow (the service account)
Standard exchange: mydomain\email
The service account is part of the Exchange Org Admins and Domain Admins
Can provide more info if needed, grateful for any help.