Had a moment and was wondering what I was doing!

I have been working through some CDO/Outlook automation - and all went (is going) well.

The Outlook piece of the project looks like this:
oOL=CREATEOBJECT('Outlook.Application')
oNS=oOL.GetNamespace("MAPI")
oNS.Logon

The other (non-Outlook logon) goes like this:
oSession=CREATEOBJECT('MAPI.Session')
oSession.Logon(lcProfileName,lcPassWord,llShowDialog) && MS Exchange Profile

Is the MAPI.Session object an Outlook server or an Exchange server - or does it blend Outlook and Exchange?