We have a couple of mailboxes on Exchange, divided into two sites.
The SSL and AutoDiscover settings for both sites are exactly the same.
Recently the one site started using a new internet domain name.
We added the domain to the Exchange server list of accepted domains and added a new reply address to each user mailbox in Exchange of site 2.
All worked well, except the users of site 2 are now receiving a message in Outlook:
"Allow this website to configure mailbox.newdomain.com server settings?
It wants to redirect the AutoDiscover config to the hosting company of the new domain, which has nothing to do with our Exchange server. Mail for the new domain is already being delivered to our Exchange server.
AutoDiscover and other settings should stay exactly the same.