Adding Hotmail/Outlook/Live.com Mailbox to Mac OS X El CapitanThe Mail app in OS X 10.11 (El Capitan) does not correctly process the Autodiscover details for mailboxes on Hotmail/Outlook/Live.com and related services. OS X 10.10 and earlier simply add the mailbox when the email address and password is entered, which is the expected behaviour. To work around this: - In Mail, add an account and choose Exchange.
 - Enter an email address with an invalid domain and password and click Continue.
 - This operation will fail, and provide the opportunity to fill in the details correctly:
Email Address | <Email> | User Name | <Email> | Password | <Password> | Internal URL | outlook.office365.com | External URL | outlook.office365.com |
- Click Continue and the account should be added.
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