Now, let us understand the configuration of Office 365 in Outlook 2016 version.
Manual Configuration of Office 365 Account in Outlook 2016 Hence the Office 365 account is configured with Outlook application and will be active after some time.You can decide to set this created profile as default b selecting Always use this profile option or get a prompt to use this profile within the Mail window. In the pop-up asking for Office 365 credentials, provide the user name and password.Under Use this authentication while connecting to my proxy server for Exchange option, select Basic Authentication option and click on OK. Select the both checkboxes options for fast and slow networks. Then select the checkbox Only connect to proxy servers that has this name in their certificate and type msstd.
Select the checkbox saying Connect using SSL only. In the opened Microsoft Exchange Proxy Settings page, type under Use this URL to connect my proxy server for Exchange field. Select the checkbox Connect to Microsoft Exchange using HTTP and then click on Exchange Proxy Settings option. Now, navigate to the Connection tab on the same page.uncheck the option Encrypt data between Microsoft Outlook and Microsoft Exchange, also uncheck Always prompt for logon credentials, select Anonymous Authentication option under Logon network security.
Select the checkbox if you want to access mail when Outlook is in offline mode.