Office 365 Migration - Internal Outlook clients are pointing to On-premise exchange server
The migration was completed successfully, all the MX and auto-discover records are set to office 365 in our DNS portal, We tested that the Outlook clients are connecting from outside the organization are able to auto-discover the mailbox settings and able to connect to their Office365 mailbox.
Now the problem started, when the on-premise users are trying configure their outlook client, it is routing to their On-premise exchange server.
What to do ? just two steps to go , to make sure your on-premise clients connect to their Office 365 mailbox.
The migration was completed successfully, all the MX and auto-discover records are set to office 365 in our DNS portal, We tested that the Outlook clients are connecting from outside the organization are able to auto-discover the mailbox settings and able to connect to their Office365 mailbox.
Now the problem started, when the on-premise users are trying configure their outlook client, it is routing to their On-premise exchange server.
What to do ? just two steps to go , to make sure your on-premise clients connect to their Office 365 mailbox.
- Create a CName record for Auto Discover in your internal DNS pointing to the office 365 auto discovery server created in your Public DNS portal.
Or
From outside your on-premise network ping autodiscover.yourdomain.com ( Note: Yourdomain.com should be replaced with your organization namespace), note down the IP address it is pointing , then come back to your local DNS and create a A record pointing to the IP which you noted down. (autodiscover.yourdomain.com should point to the IP which was resolved during ping operation from outside network). - Once one of the above record is created in your network, try to ping from your internal network and check if it is pointing to Outlook.com autodiscover server.
- Now you need to make your AutoDiscoverServiceInternalURI to null on your CAS server, use below command to make it null.
Set-ClientAccessServer –Identity “your CAS servername” –AutoDiscoverServiceInternalUri $NULL
Noe go back and try creating the outlook profile again , now it should discover the Office365 mailbox server settings with out any issues.
Outlook clients are still pointing to On-premise Exchange server - Office 365