I have an old VB application that send mail this way using a Mapi.Session
Set objSession = New mapi.Session
strProfileInfo = strServeurExchange & vbLf & strSender_I
objSession.Logon NewSession:=True, NoMail:=False, ShowDialog:=False, ProfileInfo:=strProfileInfo
Now our exchange server will be Upgrade from 2008 to 2013. Does my App will still be able to connect and send mail? If not how can I convert It?
There are a couple of MAPI CDO update that now work with E2013. The most recent is the May 2013 update which can be found here: Microsoft Exchange Server MAPI Client and Collaboration Data Objects 1.2.1 May 2013 Update
As Dmitry mentioned, you will need to use ROH though.