I have a 2008 SBS Server that was running exchange for mail services to the business. We have purchased office 365 and moved everything to 365, however I have an issue with all the client systems still trying to automatically configure Outlook for use with the local exchange server we have discontinued. The only way I can get them to connect is to change DNS on the machine to google dns for example, restart the computer, setup outlook in 365, then change dns back... But even so there are glitches and some computer keep asking for the passwords. I have disabled all the exchange services on the server, but it seems like there are some additional things I need to do to clean up Group Policy and DNS. Does anyone have a checklist for this or experience in doing so?