Here's some info from someone who provides WLM support on news.annexcafe.com that may be helpful:
"When DeltaSync support ends (Outlook.com type accounts moved to the Office 365 backend server...only IMAP, POP3, and EAS will be supported)
- if using WLM the options will be IMAP and POP3
- If using Outlook 2010 and 2013 the options will be EAS, IMAP, POP3
- if using Outlook 2007 or earlier (same as WLM)
- if using a 3rd party email client the options remain the same IMAP and POP3
For a current problem with that error...you might try the following in IE
Tools, Internet Options, Connections, LAN Settings, uncheck the Automatically Detect Settings,OK.
Advanced, Restore Advanced Settings, OK."
Note that outlook.com accounts currently using DeltaSync can be switched to IMAP now.
imap-mail.outlook.com SSL 993
smtp-mail.outlook.com TLS/SSL 587
Check "authentication required"
user name = full email address
password = password