This removes the SCP entry for this Exchange server. Set-ClientAccessServer –Identity ServerName -AutoDiscoverServiceInternalUri $null The preferred way is to use the Exchange Management Shell to clear the entry for the Client Access server from the SCP. There are multiple ways to prevent Outlook from contacting the local Exchange server first, some of them make more sense than others. When this fails Outlook falls back to the next DNS based methods or uses a local XML file. You may find that Outlook still connects to the local Exchange server for Autodiscover lookups, this is because Outlook is hard-coded to query an AD Service Connection Point to locate a server with the Autodiscover service. Consider a scenario where you moved all your user’s mailboxes to Exchange Online, for instance after a cutover or staged migration and want to remove any dependencies on the local Exchange server.
