I get the business subscription too... Really disappointed...
http://answers.microsoft.com/en-us/mac/forum/macofficeo365-macoutlook/outlook-for-mac-office-365-version-1514-150911/e348c679-930b-4cd7-9be3-25f8457ac452
http://answers.microsoft.com/en-us/mac/forum/macoffice2016-macoutlook/office-1514-broke-imap/1f7ccbe0-f8a5-4d17-8109-fe126c4e1c67
等 MS 来解决了... 只能用 webmail
A terrible morning
http://answers.microsoft.com/en-us/mac/forum/macofficeo365-macoutlook/outlook-for-mac-office-365-version-1514-150911/e348c679-930b-4cd7-9be3-25f8457ac452
http://answers.microsoft.com/en-us/mac/forum/macoffice2016-macoutlook/office-1514-broke-imap/1f7ccbe0-f8a5-4d17-8109-fe126c4e1c67
等 MS 来解决了... 只能用 webmail
A terrible morning