Getting back to this question about Outlook auto discovery
I had it solved but in fact, it is not the case...
Everything I mentioned holds true... except that if I turn back the DNS to the domain one Outlook at next launch will connect again to the old server, creating a mess !
This is a bit crazy. I have checked that
- our dns do not provide resolution for contoso.com
- the (old) exchange server is not anymore authoritative nor holds contoso.com as "accepted domain"
- I have (after exporting them) removed the contoso.com mailboxes
yet outlook forgets about it's valid setting and returns to the old server all by itself...