Set - ClientAccessService - Identity & lt Exchange Server Name > - AutoDiscoverServiceInternalUri : https : ///Autodiscover/Autodiscover.XML However, you should be moving to an architecture similar to the one show below: Unfortunately, you c an’t remove the last Exchange Server yet, so unless Active Directory & Azure AD Connect are on your decommission list, then you’ll need to keep the server around for ongoing recipient management (and maybe SMTP relay). If you can, it might even make sense to stop internal clients from accessing these services as well. What you should do now is stop publishing HTTPS services for Exchange Server to the internet. So, you’ve moved mailboxes to Exchange Online and if you had them, Public Folders too.
In our example, Outlook would find a DNS CNAME record for .com that is an alias for.
This is typically in the form Outlook begins Autodiscover again but this time looking up DNS records based on the Remote Routing Address. One attribute in particular, the Remote Routing Address (or targetAddress, to name the actual attribute) will be retrieved and provided back to the Outlook client. Instead, the user account will have attributes that designate it a Remote Mailbox. If the mailbox is in Exchange Online, a mailbox won’t exist on-premises and the Exchange Server cannot provide configuration details.