To fix this issue, enable EWS in Exchange Online. This problem occurs if Microsoft Exchange Web Services (EWS) is turned off in Exchange Online. However, the set fails, and you can't access your Exchange Online account by using Outlook 2011 for Mac. Outlook 2011 for Mac doesn't automatically set up your email server settings for Exchange Online in Office 365. So, you try to manually set Outlook 2011 for Mac to connect to Exchange Online by using the steps in the following article: When you use Microsoft Outlook 2011 for Mac to connect to your Microsoft Exchange Online account in Microsoft Office 365, your email server settings aren't automatically set for Exchange Online.
Outlook for Mac 2011 doesn't connect to Exchange Online
