Hi - we are a small 10 person company. Previously we have been using an on-premise Exchange server to handle our mail. We are now moving to Office 365 and have created the users in the cloud and migrated the mailboxes. I then tried to run the Outlook migration tool on my computer and it says that manual configuration is required - but did not give details of our situation. There WERE details of how to connect a brand new clean copy of Outlook to Office 365 but NOT how disconnect from a on-premise server and then re-connect to Office 365. Does anyone know how to do this? Thanks Ed.