I have migrated the SBS 2008 mailboxes to Office 365. The problem lies somewhere in Outlook. I can manually configure Outlook on the workstations to point to Office 365 but as soon as I reboot the workstation Outlook reverts to pointing to their Exchange Server. They are a mix of Outlook 2010 and Outlook 2011. Isn't there any way to turn off autodiscover on Outlook?