I recently had a Microsoft Tech help me reset my Office 365 Account when it failed to open and when he set it back up, he set it up as a Microsoft Exchange account. I didn't realize it at the time, now I can't change it and Outlook is useless to me. I can't seem to change it back, when I do, it tells me the email address is already in use. I have to go online to my email provider to collect my email and it is a real pain. I tried uninstalling and deleting all remnants of Office 365 but that didn't work. I must be missing something. Please help!